I have a fla that is causing me trouble. It's a fairly simple thing; it does not have a particularly large number of assets and the only UI components are FLVPlayback with a handful of associated controls.
A handful of weird things are happening. It's taking longer and longer to compile. Yes, there is a lot of scripting, but nothing particularly huge. I'm also somewhat anal about class imports. On top of growing compile time, the size of the swf is inexplicably growing larger. This morning it was at ~300kb. At some point during the day, however, it jumped to 1.5MB... with nothing added to the library and no major code additions.
In an attempt to figure out what was going on, I decided to check out the size report. Publishing then took even longer. Not "longer" as in "Hmm. That's what happens when you decide to produce a size report." "Longer" as in "Holy crap. Has my machine locked up?"
Opening the size report (which also took longer than it should), I noticed a bunch of what appear to be random characters among the already somewhat-random collection within the Font declarations. Here's a screenshot:

What gives?
It occurred to me that one of the designers might have done a poor job of defining the character sets for the fonts, so I went through and set everything to Arial @ alphanumeric and recompiled.
That was several minutes ago. It hasn't finished compiling yet.
:(
Figured it out: Helvetica Neue was corrupt. I should have been able to tell given where things go south in the size report. Ah well.
It looks like you imported the entire unicode set for Arial bold, but who knows. There would have been very slow compile time for Chinese, Arabic, etc. characters. There might have been a corruption. Glad you figured it out.