Actually, This can be caused by several different thing's. You have 2 opened center tags. And only 1 closed Center tag.
Or it is just because you are using crappy IE.
QUOTE
That looks suspciously like HTML...
No, It's nothing like HTML. If it were to be HTML, It would be allignment, Not center. And it wouldent be in those tags, It would be in "<" and ">"