I've been using Firefox 98% of the time.
Right now I'm using just one computer, but had for awhile been using two. The problem evidenced itself on both.
The problem occurs with either a weak or strong internet connection.
There's no firewall issue, at least that I'm aware of. Nothing like that has changed since before or after the problem began, again... that I'm aware of.
My connection has always been a wireless broadband connection.
I haven't installed any new software of any kind recently.
I have been aware of the idea that S.C. operates better when Explorer is used, but I prefer Firefox, and had never had any problems quite like this before. I did however (now that I think about it), update Firefox a short time ago. I suppose that might be the problem.
I'll switch to Explorer for awhile and see what happens?
Thanks evil_d, your "potentially relevant questions" have led me to a possible cause. I will get back to this forum after checking this possibility out.
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bigworm