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While the mode of infection is currently unknown, this new threat has uniquenesses over past malware for OS X.
Safari may experience performance issues, including quitting unexpectedly, running slowly, an inability to download files properly, and other unexpected problems.
If you are experiencing problems with a menu extra and can't seem to remove it by standard means, it may have a nonstandard implementation, which will take a couple of steps to root out and uninstall.
Since Safari 5 came out, a few people have complained of the application crashing. A couple of weeks ago we wrote an article outlining some of the steps to take if the application crashes at launch, but other times the program will seem to crash on a more sporadic basis.
If you see a repeating error in the OS X Console utility that mentions "Throttling respawn," here is how to approach tackling it.
Utilities Updates: Rember 0.2.3b; CopyPaste yType 2.5.3; iClip 3.5; more
AppleScript 1.8.1 confusion
Mac OS X 10.1 Technical Note posted
Mac OS X 10.4: Third-party applications
Mac OS X 10.4 (Tiger) #8: Wake-from-sleep issues, solutions; More on Spotlight limitations; Mail.app 2.0 solutions; more