This is weirder than I thought. The original text I used was:
And then there are the (i)p(/i)-adic numbers except that I used square brackets that I have replaced here by parens to illustrate what I used. Not only does it display wrongly, but on edit or peek it has a lot of inserted html. The dbcode for italics seems to confuse the parser.
You've found one of the holes in the parser - you can't safely embed dBCodes inside the URL dBCode at present. --Percy