@Samuel, I don't know what theme you are using, neither if the problem you are having is related to JavaScript issues. Nevertheless, have you tried the solution from
http://www.oxwall.org/forum/topic/1377? If it is what I think it is, the JavaScript may be crashing as result of a flaw in the jQuery 1.5.0 and failing rendering DIV objects properly as result of it.
Give it a shot and let me know if it changes anything for you.