Above Water Issues

On some maps, the water texture above, and below water will be replaced with the missing texture checkerboard. The worst I’ve seen it in was gm_reaction, and took screenshots:

http://filesmelt.com/Imagehosting/pics/5ae9274e65828cab4533140c9441b8ab.jpg Underwater
http://filesmelt.com/Imagehosting/pics/c118302259cd0b9f3a54e4367b2598c9.jpg Also underwater

It’s also noticable in other random maps, such as gm_city_freerun_2_v1 and a few others that I can’t think of off the top of my head.

What is causing this, and how can I fix it? I’ve attempted installing “water fixes”, but they don’t address my situation.

Only thing I can think of is mount or buy the episodes if you haven’t already.

Already have all the Orange Box related stuff installed.