Kristin,
Here's the code that works for me (and I'm using the link from your upload in my example):
Anyway, this is a modified case of
[ url=//www.splitcoaststampers.com/gallery/photo/666243]something I posted a while back
[/url].
You must remove the space after the opening bracket for the code to work. Notice that there aren't any double quotes being used.
It will look like this:
Anyway, this is a modified case of
something I posted a while back.
Hope this helps,
Vera