Double-click to select words in 10 requires hacking nsTextFrameThebes.cpp/nsTextFrame::PeekOffsetWord to make isWordBreakBefore == isWhitespace. This seems to work okay for English and Japanese or at least similar enough to previous behaviour, but this shouldn't be necessary. What broke?

If there's anything wrong with text fragments or the like it will almost surely be altivec accelerated text conversion...

I had thought of that, but I didn't have a G3 build up. This is a one line patch, so when I make the G3 beta later today I will comment the line out and see if it still happens in the G3 build.

You're off the hook -- it happens in the G3 build too. So I'm baffled.

This is related to issue 129, although the fix doesn't fix issue 129 itself. Gonna dupe this into that.