I have been using WP since version 2.1.3 (something like that) - I have upgraded each time with never any mishap.
About 2 weeks ago I upgraded to 2.5.1. Everything was going well, no problems.
Yesterday morning just out of the blue, my sidebar won't line up and my posts are in two columns versus one (the regular column, and using the area where the sidebar should be.)
I tried changing themes, re-installing my theme (losing all my upgrades in the process - dang) nothing worked. I de-activated all my plugins, unpublished recent posts in case they had an effect; even went so far as to re-install WP (with the exception of the content folder as I am afraid to lose all my posts. Yes i have made a backup, but have no idea how to utilize it.)
My problem still remains. HELP! I don't want to lose my page rank or readers but switching to a new "glitch free" site - what options do I have that I have not yet tried?????