I was interested in adding detail textures into my mod. I even added a button in the options menu to toggle them! Anyway, they worked great and looked good in my opinion. However, I added just a couple few more textures, and all of a sudden most detail textures just outright refused to work anymore. They still worked on my custom textures, and one texture from the half-life.wad (OUT_GRVL2).
Here's the detail.txt file: https://dl.dropboxusercontent.com/s/w6laaex94oijk99/bmn0a0_detail.txt
I hope someone can help, becuase I really like the detail textures, and I spent a lot of time implementing them.

EDIT: I found the source of the problem. Appearently, I had an invalid line in the file (out_w 3 detail/common/concrete 2.0 2.25) and if you have one, ALL entries below that will be invalidated.