it could be nice if there where a "empty disk cache" and a "empty memory cache" button on the "about:cache" page. It should be pretty straight forward since both xul and js could be taken from the pref panel.
over to gordon for a look.
*** Bug 93638 has been marked as a duplicate of this bug. ***
Bugs targeted at mozilla1.0 without the mozilla1.0 keyword moved to mozilla1.0.1 (you can query for this string to delete spam or retrieve the list of bugs I've moved)
related: bug 11008
this works from the preferences menu