I was developing a WebKit application using Mozilla 0.9.x as my browser and OneShot.cgi as my adapter. Upon hitting Reload, Mozilla would churn on the CGI wrapper, but then show the old page again. Nothing in my Mozilla cache preferences indicated that this was the correct behavior.
TavisRudd pointed to the solution: If you hold down Shift while clicking Reload, Mozilla will actually reload the page, instead of pretending to. You can also press Control-Shift-R<.
This feature originally came from Netscape, so if you have problems with that web browser, you might try this trick as well.
-- ChuckEsterbrook - 30 Nov 2001