I have to keep reseting my passowrd to a one day tempoary one as it saves my change of password but then it rejects it if I logout and use the new created password??
Have you tried deleting all cookies, cache, history, temp files, forms, saved passwords etc. from your browser? (Or run something like CCleaner from Piriform.)
Also worth noting that the password is case sensitive... (and yes, we do need to flag that up in the login page). Also that your User Name is your forum identity, not your email address (as previously).