...

...

Rob Page wrote This seems to be the frustratingly lame behavior on linux, winnt, win 9x and solaris!!! If I recall correctly, this cache stuff has been broken througout 4.x I've not been able to find an acceptable workaround other than the one you mention above.

Frustrating as hell, isn't it?

it's an open bug in Bugzilla, too - feel free to go and vote for it. :)