Ok, something has changed from FF2 to FF3. My site had a width of 100% assigned to a table. The table would stretch out to fill its defined div. Now the FF seems to reinterpret that instruction. It collapses the width to only be as wide as the column headers which is only about 50% of the width of its div (which is itself about 80& of the screen width).
I need this width to be percentage based because my people use a range of screen resolutions.
I can't find any discussion about this.