In build 9825 , I'm experiencing immediate, multiple NPEs on opening of flex probject. Syntax checking works for a bit, and then more errors accumulate until actionscript files no longer syntax check (no highlighting, no assist, transparent square in upper right).
I submitted a bunch of stack traces on Friday afternoon (US Pacific); there must have been at least a half dozen different traces.
It's too bad, because for the time that it actually works, it seems like it's getting a lot faster/better.
Thanks so much for your work on flex support, but it seems we've still got some way to go with this.
 and only in 9825, previous builds didn't show these errors on the same source files, and I've been tracking Diana weekly.