Is the problem me, or Stack Overflow?
If I post a comment or question with this named link, some text, and then an inline link the preview will show correctly but the actual result is strange. All of the text from the start of the first link up to and including the text of the second link is linked to the first destination.
For example:
[strfriend](http://strfriend.com/) is *your* friend:
<http://strfriend.com/vis?re=%28Zip%3A%5cs%2a%5cd%5cd%5cd%5cd%5cd%29%5cs%2a%28State%3A%5cs%2a%5cw%5cw%29>
Results in:
strfriend is your friend:
Notice how the entire first line is linked, and how the second link actually points to the destination of the first.
Related:
http://stackoverflow.com/questions/217533/links-to-urls-containing-parentheses