From your comment:
"despite upgrading shockwave and firefox...Running WIndows XP pentium 4, cpu 1.8ghz 512mb ram...so I guess it is to be expected.... "
I take it that you feel that your Computer may be a bit on the "light side" ????
I'm not so sure. Seems identical to what I am running. I think XP SP3 is the last decent version of Windows.
The 512 mb may be a little light. I have noticed (Windows Task Manager) that I will creep up over the 512mb and start paging. I blame the later Firefox updates for this. If I close it down (Firefox) and restart the memory usage drops.
Happy trading ....