[WetWired]

I don't have the same version as you, but there's only one line in functions.php which has both a preg_replace and array_keys call on the same line. Judging from that, I'd guess that your datastore is corrupted. I'd strongly advise against the search and replace in the SQL file. Try importing the original export, then running the tools script from the "do not upload" folder (put it in admincp or install directory) to change the cookie domain, if needed (delete it once you're done). You can then login and change any other settings.