I've just updated my forum from RC5 to 3.0, solved the problem with showing both text + icons for buttons but another problems arised. In ACP trying to add new forum and place a comment goes to HTTP 500 Internal server error. Today I was informed about another bug - when sending private message the same screen HTTP 500 Error. Any ideas how to solve? Placing, deleting or editin .htaccess doesn't work. Same error in prosilver and subsilver2 theme.
Unfortunatelly I have no access to logs and reports on the server