WordPress MU

So checking my 404 logs, I found out that the most repeated one was coming from one of the biggest blogs I host, and decided to check it out.

Turns out that the "Previous/Next" links are coming up with a duplicate url, http://domain.tld/blog/blog/page/ instead of http://domain.tld/blog/page/

I checked my site and it was loading fine, so I decided to see if it was the theme so I used the same and yes, my blog started to get duplicate errors as well. But then I switched back to the one I was using and the error was still there! I ended up testing all the themes and I got stuck with that error on my blog now.

I tried Firefox and to my surprize it was working fine! I tried IE7 and I got the errors. I tried Opera as well and the error was there.

I checked the theme files and they are all up to date with the template tags listed in the codex.

I am running mu1.2.4 with subdirectories. What could be causing this? I find it odd that FF displays correctly.

Please help :D

Ok, searching around some more I found this topic: http://mu.wordpress.org/forums/topic.php?id=5926&page&replies=7

I used SteveAtty's solution to comment out line 437 of link-template.php:

$home_root = trailingslashit($home_root);

It fixed the issue. But I'd still like to know what commenting this line will do to the functions of the software.