ok, the converter is scanned for 2 minor thingies which were found to prevent from posting the postprep code itself:
- engine does not correctly screw the URL links in code to prevent the board engine from screwing them
- onclick-tag alarm is handled but handling the onclick-handler makes the board deny the posting again.

the onclick stuff is fixed (all though does not affect normal posting)
I try to remove the other buggie ASAP

these fixes should be included in next minor update.

until that, try to prevent adding URL's in your posts.

cheers!