FCKEditor incompatible with Firefox 3.5.8?

Firefox auto-upgraded itself this morning to 3.5.8, and that coincided with FCKEditor no longer loading. No errors in the Error Console, the editor window just wouldn't load, and the existing value for the field wouldn't load into the plain text textarea.

All my coworkers (who had either upgraded manually or had the update automatically applied) experienced the same behavior. I downgraded to 3.5.7, and FCKEditor is working fine again.

Anyone know if there's any major changes in 3.5.8 that would have affected this? Or, any code workarounds that we can do to keep it functional in 3.5.8?

thanks!
pat