I did a complete uninstall of FF 1.0.7 and fresh install of FF 1.5rc and my settings and all other info. was saved to the 1.5rc version, also the 1.5rc will auto update. No problems at all. If anyone has thought about updating, I would recommend giving it a try. I like it.
Just thought I would share this. I was useing FF 1.0.7 and had the Color and Graphics Extension, so I could use the Compose Toolbar in Yahoo Mail Plus without going back to IE. When I updated to FF 1.5rc I found that the Color & Graphics Extension was not compatible with 1.5rc. Anyway for those of you that have Yahoo Mail, Yahoo has recently updated their e-mail so it is compatible with Firefox now, so the compose toolbar works fine without the Color & Graphics Extension. Thought I would pass this along since alot of people don't know this.