I was encountering similar issues, before we switched to the new server yesterday, however at this point all forum features for my account seem to function as expected.
Out of curiosity, have you closed the browser, flush the browser cache, reopen it and then test the features?
The only other possibility which comes to mind, is possible database corruption at the server side related to one or more of your postings.
Perhaps Gulson can shed some light on the issue.
BigDog