I upgraded all of my blogs (3). The first 2, one of which uses the same theme as the problem blog, went very smoothly. The 3rd..(the most important of course) will not open, or display at all. I have even re installed the theme, gone back to 2.5 (it was using 2.3 before), disabled the plug ins, updated the plug ins, and everything I can think of...and it still will not load. I can get into the back end (admin) no problem, and I have not lost any content or anything. It just will not load. Does anyone have any suggestions? Any help is appreciate, thanks.
can you try to clear your browser cache, temporary internet files, cookies, etc. then try again. or are there any error being displayed?
I recommend just clearing out the host, and reinstalling wordpress, and then add everything in. This is the only sure fire way to fix your problem.