When putting mytopposter.php in plugins, it breaks the plugin area of ACP for some reason.
Any ideas?
Hmm, probably best to contact the author - but I thought you used Wildcard's sidebox? The top poster of a day is a sidebox module.
I have shot him a PM
I do use sideboxes. This plugin puts it in header. Will give the sidebox module a try though and see how it turns out.