Wow! Ok, I do have the same exact issue as shown, but it didn't help me any. This is weird, something is amiss, and had to have changed in the program script of some sort, and carried over going from .16 to .18 for the internal window not to size correctly.
And this is working on a 17" widescreen laptop, it can stretch forever if it needed to, lol!
Hmm, should I revive that post or just start a new one for everyone to look into?