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Opera browser Technology Preview released Web Browsers
I noticed today that Opera has released the technology preview of their Opera browser for OS X. I haven't had a chance to try this one yet, but the Classic version is incredibly fast at page rendering! Check it out and send them your feedback if you want to see another good browser developed for OS X.
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Simple Mac OS X Perl tutorial UNIX
There's a simple tutorial that explains how to write and execute a Perl script under Mac OS X located at http://www.mactipscafe.com/tip015/

[Editor's note: MacTipsCafe has some other tips on using OS X as well; make sure you check out the home page while you're there.]
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Aliases to remote volumes fail in docked folders System
I create a Dock Items folder in my Library folder. Within that folder, I create several folders each containing apps I want to frequently launch but don't want them all in the dock. I drag these folders to the dock and this way I've got the same type of thing as an Apple menu.

But I've noticed that any alias I created to anything on a network volume doesn't work properly when navigating from the dock. Normally when I double click the alias in the Finder, it asks me to connect to the volume that the original item exists on. If I browse to the alias in the dock and select it. Nothing happens. Bummer. It would be nice if the opening docked items were the same as opening the same items in the finder.
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Browse menus with option key to see more choices Apps
Holding down the option key while perusing the Finder menus reveals some neat options for manipulating windows. OmniWeb also reveals several options which are not otherwise available directly from the menus.

I guess these are some of the little things that Jobs said wouldn't be found for a while, but show the detail put into the interface. I tend to agree.
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Updated Developer Tools released System
Apple has released a new Developer Tools package, with improved Java support and other improvements. You can download it for free if your a registered Apple Developer (there's a free online-only developer level available). You can download the whole thing (nearly 200mb), or just the bits and pieces you're interested in.

You need to start at Apple's Developer Connection Member Site, login (register if you aren't already), and the hit the Download link to see the new Dev Tools packages.
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A detailed look at memory usage in OS X System
I collected the following illuminative posts from Barry Sharp on system memory management from the Apple discussion boards.

- Dennis Hill

[Editor's note: Dennis suggested I cut this down to a concise summary, but I thought I'd just publish them as they were written by Barry; he obviously has a great deal of knowledge about Mac OS X! These emails were originally sent by Barry to Ted Landau at MacFixIt, and then were posted to the discussion group where Dennis found them. So if you'd like to learn a lot more about OS X's usage of memory, read the rest of this article. It's a bit long, and can get technical at times, but I found it very interesting.]
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Apache security hole in OS X Client UNIX
Stefan Arentz has discovered a security hole in Apache which affects Mac OS X Clients serving pages off of HFS+ formatted volumes and using .htaccess for protecting directories. Since HFS+ doesn't care about capitalization, but Apache does, you can access a protected directory (say "test") by using a version with capitalization ("tEsT"). Apache won't see this as a request for a protected directory, and HFS+ will return the file, since it doesn't care about the capitalization. Instant password protection workaround.

Stefan has posted a thorough description of the bug on SecurityFocus; check out the article for more information, along with a suggested workaround until Apple releases a patch of some sort (if they do).

If you are serving pages from an HFS+ disk, protected with .htaccess files on your OS X client box, this article and workaround are a must read!
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Easy and complete folder backups System
"hellmachine" posted a one-line terminal command in this MacNN forum which will copy a given directory, including all hidden files and resource forks, to a backup location:
sudo ditto -vR -rsrcFork /Users /Volumes/Backups/Users
This example would back up the Users directory to a volume named "Backups". The -rsrcFork option will handle the resource fork of the files during the copy.

I have not tested this myself, and I cannot find any documentation ("man ditto") on the -rsrcFork option. Use at your own risk, but it doesn't look too threatening, as ditto is a copy command.
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Install a replacement mail server UNIX
Not sure if this has been posted here yet, but though it might be of interest. Turning your OSX box into a mailserver by replacing sendmail with Postfix. Very easy to follow guide and thorough explanations.

http://www.stepwise.com/Articles/Workbench/eart.index.html

Article by Graham Orndorff
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Empty a non-emptiable trash can System
I tried everything I knew, or could find via Help, to get permission (booted in OS 10.0.3) to empty my trash, without success, including reinstalling OS X. I noticed something peculiar (after much trial and error): when first booting under 10.0.3, the Trash icon would show as empty, but as soon as it was clicked on, it appeared full.

Here's how I got things back to normal: while booted under X, I opened the trash (successfully), then double-clicked on the "Desktop (System 9)" folder and created a new folder. I then Selected All files in the OS X trash and dragged them to this new OS 9 folder.

The move was successful, and since then the OS X trash has behaved normally. The next time I booted under OS 9, I dragged the new folder (filled with OS X trash) to 9's Trash and successfully emptied it (using Option/Empty Trash, as some files were locked). I regained the appropriate amount of disk space, and the problem has not recurred as of this posting.

I don't know, but suspect, what happened: I think I must have put some files that originated under OS 9 into the OS X trash.
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