It looks like the FireFox 1.5.0.3 upgrade has broken submitting comments on Movable Type 3.2? I've opened a trouble ticket with Six Apart and I'll see what that gets me. In the meantime IE, Lynx, and pretty much anything else can submit comments fine.
Since installing the Flash 8.5 Beta Firefox has been crashing on a fairly regular basis when my Mac is coming out of sleep mode. I'm going to try reverting back to Flash 8 and see if that makes the problem go away. I've also recently upgraded Firefox due to recent security issues and I'm fairly certain the latest round of Mac OS patches got pushed out also, so the blame may not be squarely on Flash but given that it's the only beta product in that mix I'm going to try that first.