> I suspect it's Konqueror keeping the cache below the size threshold
Do not think so. I have cache size in my konqueror set to 1 KB (in reality konqueror have cache about few megabytes with many small files - this is also bug; you may ask why I need so much small cache - this is simple, I need it for correct work with my cache-proxy, this is because of enabling or disabling cache in the browser changes its special headers within packets), and my cursor becomes bouncy and only after about 5-10 minutes becomes normal again (this MUCH more than maximum time in my setting - so this program probably try to start more than one time I think).
> I suspect it's Konqueror keeping the cache below the size threshold
Do not think so. I have cache size in my konqueror set to 1 KB (in reality konqueror have cache about few megabytes with many small files - this is also bug; you may ask why I need so much small cache - this is simple, I need it for correct work with my cache-proxy, this is because of enabling or disabling cache in the browser changes its special headers within packets), and my cursor becomes bouncy and only after about 5-10 minutes becomes normal again (this MUCH more than maximum time in my setting - so this program probably try to start more than one time I think).
I have currently KDE 3.4.2, Debian GNU/Linux.