rcook, I think I found the reason. On the "preview" page, IE creates this snippet: < FORM action="messages.ez" method="post" > < INPUT type="hidden" name="Subject" value="Re: Preview Post bug" > < INPUT type="hidden" name="ForumID" value="12357" > < INPUT type="hidden" name="NotifyPost" value="Y" > < INPUT type="hidden" name="Body" value="test" > < INPUT type="hidden" name="LinkURL" value="http://" > < INPUT type="hidden" name="ImageURL" value="" > < INPUT type="hidden" name="ParentID" value="367924" > < INPUT type="hidden" name="Content" value="???" > < INPUT type="submit" name="SaveMessage" value="Post Message" > < /FORM > iCab creates this: < FORM action="messages.ez" method="post" > < INPUT type="hidden" name="Subject" value="Re: Preview Post bug" > < INPUT type="hidden" name="ForumID" value="12357" > < INPUT type="hidden" name="NotifyPost" value="Y" > < INPUT type="hidden" name="Body" value="test" > < INPUT type="hidden" name="LinkURL" value="http://" > < INPUT type="hidden" name="ImageURL" value="???" > < INPUT type="hidden" name="ParentID" value="367924" > < INPUT type="hidden" name="Content" value="???" > < INPUT type="submit" name="SaveMessage" value="Post Message" > < /FORM > So the reason for the bug is the ImageURL entry - if you don't specify a file with the button, IE leaves it empty, but iCab gets creative and sets the value to "???". I guess that your board software stumbles about the fact that "???" is no valid filename. Do you know if this "???" is legal behaviour for a browser, or a violation? If it's a bug I will tell the iCab folks about it.