I've already modified the default master, and it helped. But we have seven subsites, and are also seeing the caching problem on the main login ("Welcome to OpenACS") page, which isn't part of a subsite.
I basically want the system to turn caching off for anything that lacks a .jpeg, .png, or .gif extension. Under Apache, it would be pretty easy to do this. Surely there's a way to configure AOLServer to output HTTP headers conditionally, no? And if not, then perhaps I should put such code in the templating system.
