strange behaviour with POST (PHP 4.0B2)

Hi, I've got this realy strange behaviour of Beta2 (for win32) with POSTs. I've reduced the problem to this: I've got this simple rudimentary file (postit.html): <FORM action="dosomething.php" method="POST"> <input type=submit value="submit"> <INPUT TYPE="hidden" name="label" value="foo"> </FORM> Now, this form doesn't do anything intelligent at all, it just prints a submit button. But that's not the interesting thing. Calling this file with Beta1 didn't do anything strange at all. dosomething.php was called an processed. But now, after having upgraded to beta2, I get an internal server error. Now to the weired part: I played around a bit and then found out that if the name of the file (postit.html) was shorter than 5 letters (eg: post.html), the internal server error disappeared. Whatever the name was, as long as it did not exceed 4 letters, the error disappeared. So how/why does this happen? As I mentioned before, with Beta1 everything worked fine! So I guess it cannot be my configuration, something of php must have changed that produces this error. I am using Apache/1.3.6 (Win32) any hints, anybody? Costas (Karlsruhe, Germany)