FireFox 3 issues

I'm having sporadic issues with SD+ in regards to entries saving. On various screens (e.g. New Request, Reply to a request, etc) when I select Save (or Apply or whichever "button" effectively submits the page results), I routinely get no response from the server. I'll get Connecting to SD+ IP address in the bar at the bottom and the firefox progress indicator never progresses. I can copy the info, open a new window, replicate what I just did and then Save works (most of the time). This is more of an annoyance since I have to cut and paste items to get them to apply.

Note - in most cases it will complete the process (i.e. New Request - Save) - it actually saves the new request. I just don't get a screen refresh). In some cases, it does not do this (e.g. reply via email). My workaround - open SD+ in another window and check that what I've asked to be done has actually completed.

Environment
XP Pro SP3 + Updates
Firefox 3.0.3
Addins:
AdBlock Plus (SD+ site is unblocked)
NoScript (SD+ site is unblocked)
Flashblock

I will try and replicate this in IE7 but prefer to use Firefox since I use it for nearly all other sites.

-tony