Windows 7 - Attachments window full size!

OK .this is starting to bug me now.
A while ago when i attached a pic to send to 7f the attachment window would open full size, it didn't use to. i remedied that and i cant for the life of me remember how.
Its started again and i cant get it to open in the small window.
I'm using firefox 3.6.11
anyone got any ideas
I use the feature a lot and i like to still edit my text whilst keeping an eye on the status of attachment upload.
Thanks!

Download the free VSO image resizer & resize them first.
Free Image Resizer Software, Import organize resize photo

sorry .its the actual window to upload attachments that is opening full size when it should open small .not the size of pics im uploading.

Its ok i fixed it it only took about an hour but ive got it , its difficult to explain the fix, but when i re-opened firefox after saving and quiting the resized attachment window opened with my bookmark sidebar also so i closed the bookmarks resized the page closed it restarted firefox and when i re-opened it and selected the attachments paper clip it opened how i want it so i got it now and this post will remind me in future . bit long winded but its fixed and thats the main thing.