php5beta4 problem

Hi, just updated from beta3 (which worked fine) and now my system is hosed. I am running Apache 1.3.29 on WinXP and when I try and simply bring up phpinfo I get the following message in the Apache error log file: "Premature end of script headers: c:/php/php.exe" Anyone any idea what is causing this?? One thing I did notice is that the Zip distribution of b4 is different to b3, for example it no longer creates a sapi directory with the apache dll's in, so I am wondering if this problem might be due to subtle differences in the distribution. Any help would be much appreciated. G.