Perian updated to 1.2.3, fixes several 1.2.2 bugs
Perian, a plugin that vastly expands QuickTime's suite of supported video codecs, has been updated to 1.2.3. The Perian 1.2.2 update released in April apparently introduced a fair number of new bugs, and 1.2.3 is essentially a bugfix release designed to squash them.
While Perian said 1.2.2 would be the last version to support pre-10.6 versions of Mac OS X, the system requirements for 1.2.3 still state that Mac OS X 10.4.7 and above are supported. The update includes the following bug fixes:
Some Fraps videos only displayed black.
Workaround checks for Front Row stopped being effective.
Fixed compatibility with web video playback.
Worked around System Preferences crashing during an update on 10.6.
Further fixes to Matroska import.
The update is just under 4 MB, and you can either download it from Perian's site or check for updates from the Perian prefpane in System Preferences.