If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
Are there any LWers in the area you could get to look over your shoulder to troubleshoot?
The rest of my probability is in the problem going away when you try posting from a different computer.
It might be easier to organize a quick Teamviewer session. I'd do it if I had ever actually submitted a top-level post.