did a little googling, and it appears to be a recurring thing with AMD in recent years (Borderlands 1&2, Portal 2, several other games). Lots of speculation, tied into tessalation issues, compressed textures, blah blah blah.

If so, might be able to get around it by reconfiguring drivers or something (maybe adjusting Catalyst AI and such)--or perhaps not even installing/running CCC at all and instead configure it with ATT or something. Been using ATT on my desktop for ages because of CCC issues back in the earlier days of ATI, and that system never throws VFC errors, even when compiling videos.