I'm not expert... but if I were you : <br>-test a copy of your wiki localy, or elsewhere (on a free host for example) to see wether you get same trouble or not (so you could determine if the trouble is caused by your server or by your pmwiki install). <br>
-try installing a new pmwiki, last beta, in another folder and copy your wiki.d in the relevant folder ? Some file may have been corrupted ?<br><br>