Mac OS X 10.4.7, PowerPC
I've installed a whole bunch of applications recently, though I can eliminate every single one because the problem existed before I installed any of them. In fact, it started when I did a .Mac Sync after doing a total reinstall of Mac OS X.
Feeds I get:
Apple Hot News
Apple Press Releases
Apple Developer Connection
Coldfront (Kingdom of Loathing)
MacRumors - Page 1
MacRumors - Page 2
MacRumors - Forums
Slashdot - Main Page
Slashdot - Apple
Slashdot - Developers
Slashdot - Games
Slashdot - Hardware
Slashdot - Information Technology (IT)
Slashdot - Science