Thank you BWinkler. I guess it's not related to remote desktop at all because I found a spare keyboard and mouse and plugged them into the 2nd PC (our newly dedicated TC PC), rebooted it; then I opened TC and ran the very basic login script that worked on my own PC 2 days ago. It failed with the exact same error as before, which tells me that the issue is not with remote desktop at all. Arg!
I think I'll open a case. I've copied all the projects and scripts over that worked previously to the new dedicated TC PC. The URL is fine when I access it manually but not when using TC.
What version of FF is on the PC that you are having the errors with? Are you sure you have the right right patches for the version? I would start there first.
