After a few months of usage (and plenty of experimentation) of my Eee PC, I finally had to resort to a F9 restore to bring it back to the original factory settings.
For some reason, I was starting to get error messages. (related to "dcopserver"), and the Eee PC was also getting sluggish.
A quick check via the EeeUser forums revealed a few possible solutions, but after trying them (with limited success), and a urgent project to complete, I bit the bullet and did what is commonly called a "F9 restore".
Now I'm back to plain old Firefox 2.
It seems the problem may return, but I will research more before doing anything silly.