Please Login to Remove!
Actually, here's a small tip.
There are certain FONTS that seem to crash 4.6
It never likes me using Verdana or some other non standard fonts.
Therefore, I suggest, whilst you make the changes to the theme, save it, then export it to a ALX or JAD. That way, you don;t loose what you;ve done, and can benchmark where the errors are based on your changes.
I know it's a pain in the ass, but works for me, and saved a few themes and progresses several times ;)