Thanks for the quick fix - will have to build much later tonight because it's an active server and can't risk the loads.
At first I didn't think that PHP does a chdir to the executing script's directory but I guess it does since wordpress tries to use require('./wp-load.php') which implies a local directory, and it works from apache's version.
Does the "Build Matching PHP Binary" auto-download the newest LSAPI or should I manually replace it somewhere first?
(by the way 4.1.10 definitely fixes the supercache gzip problem, many thanks)
Last edited by aww; 12-31-2011 at 12:46 PM..