Hello. I was editing a Thread and wanted to save it, but it just disappeared. Only a refresh (f5) helped.
To show you what i mean i´ve made a screenrecord (watermark of the software is visible cause i just downloaded it)
Can you confirm this with a non-beta version of FF? (Or any other browser really?) Alternatively, I would suggest using Firebug to see if anything comes back, but I don't think that it works with FF4 yet.
We'd need to get a more specific error, or more details on whether the request is still pending. I'd have to recommend enabling Firebug's console. You can use that to look at the last Ajax request, see what was returned, and if there was a JS error.