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A fix for an odd Thunderbird/Firefox font problem Apps
Tiger only hintAfter upgrading to Tiger, I had awful problems with both Mozilla Thunderbird and Mozilla Firefox. In ThunderBird, HTML composition was awful -- typing would get ahead of the text displayed until you hit enter, and if you backspaced, forget trying to decide what was there. In Firefox, the problem manifested itself as a text kerning/rendering issue. Links or bolded fonts would sometimes overlay the word next to them that was in normal font.

I figured out what was causing this, at least for me. For some reason, I had a full copy of both the FontCollections and Fonts folders from /System/Library in my user's Library. I have no idea how they got there, but I did the following to get rid of them:
$ cd ~/Library
$ tar cf ~/LibraryUserFonts.tar FontCollections Fonts
$ rm -rf FontCollections/*
$ rm -rf Fonts/*
Log out and log back in. The display problems in both FireFox and ThunderBird have now completely disappeared.

[robg adds: This is a fairly specific incident, but since the author doesn't know how the copies of the fonts wound up in the local Library, I thought it might be worth running, just in case someone else is having similar issues.]
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A fix for an odd Thunderbird/Firefox font problem | 13 comments | Create New Account
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A fix for an odd Thunderbird/Firefox font problem
Authored by: kyngchaos on May 27, '05 12:03:07PM

Maybe an isolated case, but not so isolated problem.

On a few Panther Macs I've had font files mysteriously copied to other locations.

One, without any 3rd party font management, all fonts in /Library/Fonts were copied to the Classic fonts folder. This created a massive slowdown on login and crashed many applications, with having all those duplicate fonts active.

On one, with MasterJuggler, the whole MasterJuggler library (outside any system fonts folders) was MOVED to the Classic fonts folder (the user had R/W on the MJ fonts, as opposed to the above case where it was read only). I wonder if this has to do with fonts being active - the whole MJ library was mysteriously activated a few days before, and it may have happened then.

No font copying problems yet on Tiger.



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Use Font Book to Weed out Duplicate Fonts
Authored by: mfuhrer on May 27, '05 01:17:21PM

I had the same problem when I upgraded to Tiger. Text in Camino (a Mozilla-based browser) would frequently overlap, making some words nearly unreadable. Upon firing up Font Book, I noticed many of my font families had a bullet ( • ) beside them, indicating that duplicate font files were being loaded. By expanding the disclosure triangle beside affected families, I could see which individual fonts were duplicate. I selected the duplicates and chose Edit > Disable Fonts (File > Remove Fonts would be another option), and then restarted Camino. Lo and behold, text rendered very nicely again.

In my case, the duplicate fonts were .ttf (eg. Helvectica.ttf) files that I had manually placed in my ~/Library/Fonts directory some time ago. They never caused problems in Panther, but seem to conflict with their corresponding .dfont (eg. Helvetica.dfont) files in Tiger.



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Use Font Book to Weed out Duplicate Fonts
Authored by: HeelToe on May 27, '05 02:50:01PM

I ended up having to do this, too.

Also, plain old rm of the files does not end up solving the problem - they get copied back again. I had to disable my user fonts from the Font Book application, then go and resolve all the duplicates as you mentioned.



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A fix for an odd Thunderbird/Firefox font problem
Authored by: alangrady on Jun 16, '05 10:47:04AM

Thank You, Thank You, Thank You!

This was driving me NUTS. As a web developer I'm constantly viewing Source and it was a jumbled mess. In addition, I also do a lot of data entry on the backend of our websites and trying to make sense of the garbly-goop that was appearing in the text area box was maddening.

Once again, thank you for this hint. You are my Hero.

---
-------
Alan Grady



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A fix for an odd Thunderbird/Firefox font problem
Authored by: hatkinson on Jul 28, '05 06:22:05PM
mfuhrer has the right fix here; the font problem is caused by duplicate fonts. You can take care of it very quickly using the Font Book: Select the "Computer" fonts; all duplicates have a little bullet after them. Use the command key to select all of the fonts with duplicates, then choose Edit > Resolve duplicates. It will go through and disable any User fonts, and when you restart Firefox (or whatever) the problem is gone.

This way you avoid deleting fonts -- if you want to make a backup of all of your fonts they're still all in your user fonts directory, even the system fonts.

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A fix for an odd Thunderbird/Firefox font problem
Authored by: starspeedr on Apr 29, '06 07:37:28AM

Hi. I also have this problem of duplicated fonts making Firefox useless. However, I have tried solving this problem via the "Resolve Duplicates" option, which does work initially, but after using Firefox, all of the duplicate problems reappear! Why does this keep happening? Please help me.



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A fix for an odd Thunderbird/Firefox font problem
Authored by: mkneller on Apr 07, '06 02:58:09PM

This sounds pretty unusual, apart from the fact that this happened to me on a brand new MacBook Pro, I hadn't done anything except install Firefox and XCode.

If it weren't for this tip, I was thinking that the Intel Firefox build was broken...



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A fix for an odd Thunderbird/Firefox font problem
Authored by: armeen on Sep 12, '06 11:18:28AM

i have removed all the duplicate fonts. logged out and back in again and the problem still remains. i just upgraded from my old iboo to a new macbook and ever since having problems with firefox dispalying fonts properly!!! any new ideas?



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A fix for an odd Thunderbird/Firefox font problem
Authored by: usersfirst on Mar 05, '07 06:09:37AM

Perfect solution! Thanks! (5 stars)

Pete



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A fix for an odd Thunderbird/Firefox font problem
Authored by: skorry1 on Apr 08, '07 08:47:37PM

I had the same problem on my Intel iMac. Thanks for posting the fix. It was making me hate Firefox.



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A fix for an odd Thunderbird/Firefox font problem
Authored by: lucerodesign on Aug 02, '07 07:53:41AM

Using Terminal always stresses me out. must be the "$"'s. I tried the less daunting solution by mfuhrer first, and had no success.

HeelToe's suggestion worked for me. Thanks everyone!



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A fix for an odd Thunderbird/Firefox font problem
Authored by: kristarella on Oct 30, '07 06:03:52PM

Are you sure this was caused by *duplicate fonts* and not by custom fonts? Essentially you've just deleted from your font library any TTFs that you've installed.

I've been having this kerning problem and it was pissing me off, but it doesn't happen on all sites, which leads me to suspect that it's just the sites with CSS that asks for a TTF font that isn't interpreted correctly. I suppose that could apply to the CSS asking for a font that was duplicated too, but the first option feels more plausible to me.



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A fix for an odd Thunderbird/Firefox font problem
Authored by: wickwood on Nov 25, '07 05:43:08PM

I too am experiencing this problem, but not on all pages.

It manifests itself on Google Search Results with every Bolded word that was part of the search phrase.

It also manifests itself in some form input textboxes. When this occurs, the cursor does not keep up with the words that I'm typing. And deleting moves the cursor backwards, but doesn't fully erase the characters.

I have determined that my problem is has nothing to do with duplicate fonts. I downloaded LinoType FontExplorer X ( http://www.linotype.com/fontexplorerX ) to be sure that I had no font issues, (and there were some that I corrected), but none of them corrected the problems.

By using Web Developer FireFox Extension, I have been able to determine that the problem appears to be a CSS Issue.



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