It's going to be down for a while, Oktagone is broken (suprise, suprise) and I think they hosted him.
Instead, refer to this page:
http://www.valve-erc.com/content/resources/zhlt/ZHLTProblems.html[quote]The 'missing [ in texturedef' message can be caused several ways:
* One or more faces has no texture, or the texturename is just made up of spaces. Check for problems in WC 3.3 should detect them as 'invalid texture' messages.
* The texture name on one or more faces has a space in the middle of the name somehow (Textures are not allowed to have spaces in their names)
* You are using Worldcraft 2.0 or 2.1, and the worldspawn has a key/value of "mapversion" "220" If so, remove it.
* A Worldcraft 3.3 map was imported into WC 2.1 or 2.2, same problem as above.
* A Worldcraft 3.3 map was imported into Quark, also the same problem :)
* The map is in Worldcraft 3.3's .map format, but the "mapversion" "220" is MISSING from the worldspawn (this is really rare).
[/quote]
Run a check for problems (Alt-P) and fix those errors, if any show up, then refer to the additional possible causes.