I realize this may have a (very) limited audience, but I recently discovered that the multimedia keys (volume up/down/mute, play/pause, stop, next track, prev track) on my Logitech keyboard can be used to control iTunes when used with the Logitech Control Center (their OS X driver suite). These keys work even when iTunes isn't the frontmost application.
I don't believe Logitech documents this anywhere and I discovered it by accident. At first I didn't think they did anything because it takes a moment or two (close to a second on my machine) for the keystroke to register back at the Mac. The volume keys affect the global sound level with no delay.
Specifics: iTunes 3.0, OS X 10.2, Logitech Control Center 1.02, Cordless Desktop Pro keyboard. I'm now on iTunes 3.0.1 & OS X 10.2.1 with no ill effects - no improvements either. I don't know what the mininum levels for this functionality would be.
I was noticing today that the browser forward and back buttons (by default the two side buttons) on my wireless Microsoft Intellimouse Explorer work to go forward and back a photo at a time in iPhoto's edit view. Kind of handy.
One of the last remaining reasons for booting to OS 9 for me was the inability of OS X to mount PCDs (Kodak PhotoCD master discs). After installing Jaguar (10.2), I discovered that at least the discs show up on my desktop, but Photoshop, GraphicConverter or Preview will not open the .PCD files.
Just for kicks, I launched iPhoto, clicked File -> Import..., and it began importing all the images from the disc. It grabs them at the max resolution (3072x2048), but at least they're imported and you can resize them later.
I was recently needing to create a simple QuickTime slideshow and stumbled across a great piece of sample code on the ADC website. It's called SlideShowImporter and enables the QuickTime player to construct movies from XML files (after you copy the included SlideShowCarb.component into your ~/Library/QuickTime/ folder). Elements can be images, effects, audio files... basically any QuickTime media type.
I teach at a university and my students send me weekly emails with their thoughts on the material studied. To create a digest of their thoughts, I have to go manually through each message, copy it, then paste it into a Word document. It takes a lot of time.
Then I discovered that I can use the "Save As..." dialog in Mail app to make a quick digest of all e-mails together with email addresses, date, and subject of the e-mail. You can save all the messages in a particualr folder by simply selecting them and then clicking "Save as" choosing a format: plain text, RTF, or raw source. I know that many of us miss Entourage Many To Word script that did an excellent job of saving email digests as a Word doc but this shortcut should help those who migrated from Entourage to Mail.
I've had a problem with unexpected quits when using Word from MS Office v.X (with service update 1) on both my laptop and desktop since upgrading to 10.2. The problem arises when opening or editing existing Word documents created under 10.1.5 or earlier. It seems that the docs themselves break after opening for the first time in 10.2. Fortunately, the fix is an easy one:
Open the offending document (it took me several tries to get it on screen without crashing).
From the tool bar, click the "¶" button to reveal all paragraph locations.
Select all text EXCEPT the FINAL paragraph symbol (turns out Word uses this last symbol to carry the bulk of the formatting info for the document).
Paste all the text into a newly created blank document.
Do a File -> Save As.
Trash the old, damaged document.
That's it - the newly created document should now behave perfectly.
I just added some new addresses to my address book and found a cool mapping feature that I believe is new in 10.2. After I finished editing the cards, I double-checked the addresses and clicked the address type (e.g. home or work) and up popped a context menu with a single item, "Map Of". Click on this item and your browser will open to mapquest.com.
[Editor's note: There are actions associated with most of the other Address Book fields as well; click on the category label for each to see the choices.]
I was pulling my hair out looking for a way to render styled-text emails that I received as plain text in Mail.app. For a while, I settled on clicking "Reply" then reading the email in the resulting window as plain-text, then I discovered that I could Option-double-click on a styled-text email's listing in Mail.app to view a plain text version of it.
[Editor's note: I don't have any styled text messages to test this with. When I option double-clicked on an HTML formatted email with text and images, all I saw was an "image.tiff" tag at the top and no text at all.]