Beta 2 is released. This fixes the issue with widgets and bookmarks on Leopard (confirmed this time :), and has the video repaint fix I was waiting for. Sadly, this fix reduces speed a bit, but the display glitches the bug was causing were really quite unacceptable. People who also want to use the Ghostery add-on should see if the tweak in issue 67 fixed things for you.
Beta 2 also adds more AltiVec-accelerated scaling and YCbCr conversion routines to make three of four scalers converted, which reduce CPU usage while playing back video by about 33%. For example, my 1.33MHz iBook G4 can now play Mozilla's brand video with only occasional video freezes, and the 450MHz Sawtooth can now finally play it at all. In fact, VP8 (WebM) video due to our juicing and custom code now performs better than VP3 (Theora). The fourth scaler is a complex edge case and I'm trying to weigh how to best do it. I should also note that these AltiVec accelerated modules are actually only about half as effective as they could be -- since they are more or less simple-minded ports of the Intel MMX versions, they only use 64 bits of the 128 bit AltiVec vector registers because the MMX registers are only 64 bits wide. Once our versions are well-proven, I will try to refactor them to handle more data at a time; it's just easier to debug the algorithms if they are similar.
Read the release notes, then get: