> but rarely do I check my work in IE as I'm so sure it'll look fine
That's pretty scary.
To me that sounds as though a programmer would say:
"I hardly ever compile my code on BSD, I'm usually sure it'll work just fine"
And I'd not believe him. In your case, I'll give you the benefit of the doubt, but at the same time I'd urge you to test it anyway but that's from a programmers perspective again.