Upgraded from 2.5 to 2.5.1- did everything advised in extended upgrade steps. After upgrade, several plugins not functioning properly, and it seems to be having problems updating the database- simple changes are saved, but complex changes are not-- for example, if I use a short string of html in the "text" widget, it will save fine, but if I use a longer, more complicated string, it will not save. Same goes for posts- short posts work fine, but longer posts are truncated.
Should I export my posts, etc, then delete my database, reinstall, and import my posts again? Or is it likely due to plugin incompatibilities with 2.5.1? My theme is a custom theme (blue-box-10), and I have edited the css, but I can't imagine that would be the problem (not likely that the theme would affect WordPress admin, is it?)...
Any suggestions?