broken window mode!

I can no longer play because window mode is suddenly broken!

I played the last 2 weeks in window mode, and now, with out changing anything, if I log in, select my character and enter the game the window changes to a size that will not fit on my screen.
The window is the correct size right up untill I have selected my char and enter the game!:mad:
I can not click anywhere on the right hand side of the window, and NONE of the buttons at the bottom left are accessable, so I con not change back to normal non window mode!!!!

Is there some way to fix this BS or do I finally give up on rohan and play something else...:mad:

Did you give your account info to anyone?
Do you get a black screen after selecting your character?

If this is the case, I might be able to help. Otherwise I don't know.