[Mediawiki-api] Fatal error: Class 'ApiParse' not found in ApiMain.php on line 333

[Jeremy Byrne]

Hi All,

I'm consistently getting the error in the subject line (or close 
variants--some actions get further than executeAction() before throwing 
a "Class not found") when attempting to use _any_ API action other than 
query (which works fine). I've tried it on two 1.11 installs on machines 
with totally different php setups. I'm using repo directory revision 
35899 of the API.

Thanks for any light you can shed on this baffling and frustrating problem.

CYa,
JEREMY