Okay, just now: I had Firefox (1.5, if it matters, on Windows) open. I closed it. I remembered something else I wanted to check. I re-opened Firefox. Now my address bar looks like this. The navigation icons are all…gone. They still work: I can click the invisible back button and it goes back. The only thing is that the nice little icons are gone, to which I say: huh?
Where did my icons go, why, and how do I get them back?
I don’t know if this will solve your problem, but it is an odd behavior I notice at times with my Windows / Firefox combo. If I close Firefox, it looks like it is gone. But if I open Task Manager, Firefox is still active. If I close it from Task Manager, after ignoring the warning that bad things could happen, then open Firefox again, missing items are restored.
Huh, that [ending the process which for some reason kept running] worked. How odd. But thanks - I feel whole again now.