For those having problems with pane size I would offer a possible fix that worked for me. For 2 years my jpeg folder opened jpeg's full screen size. (opening with iexpolrer) Suddenly and for no known reason they opened minimized. And IE pages would sometimes open small. I tried all the suggestions as described in a couple posts below. (per session fixed at best) But to no avail.
I recently clicked the IE Repair desktop shortcut as created awhile back offered from Mosaic1...(I think and apologize if wrong). Clicked on 'Repair Internet Explorer' and presto--- All folder contents and windows open full page. I had give up (Got IrfanView) but this problem has been solved. If not the IE Repair then the same magic that caused the change, changed it back.
I would try the Repair. And Thanks for the IE Repair shortcut info Mosaic1 .
Glad i finally got around to clicking on it.
Good luck.
carson...