When I went from a normal 1280x1024 monitor to a wide-screen monitor, I had this problem. I think my reso now is like 1680 x 1080 or something, and I had to go into my eqclient.ini and force the resolution to 1280x1024 first, then once I got in-game I could adjust after.
My current eqclient.ini block:
Code:
[VideoMode]
Width=1280
Height=1024
WidthWindowed=1280
HeightWindowed=1024
WindowedWidth=1600
WindowedHeight=900
FullscreenBitsPerPixel=32
FullscreenRefreshRate=0
Even with these settings, my client (windowed mode) is 1600x900. I haven't tried full-screen in a long time, because that's just now how I run game clients