Fixed in 457
BYOND Version:454
Operating System:Windows XP Pro
Web Browser:Firefox 3.5.3
Status: Resolved (457)

This issue has been resolved.
Descriptive Problem Summary:
When centering vertically in the interface it doesn't account for the status bar.
Numbered Steps to Reproduce Problem:
Make anything in the interface editor stage and right click-> properties -> fill window
Modify the size slightly and hit center vertically it will overlap the status bar if the windows big enough.
Expected Results:
To put it in the center
Actual Results:
It doesn't subtract or offset the status bars height from whatever formula it is using and is slightly off from center.
Does the problem occur every time?
Every time

Before clicking vertical center!!!

After clicking vertical center!!!

Position it manually