A friend of mine was trying to compile bestcrypt-1.6_p15 against the 2.6.24 kernel. They ran into the problem mentioned at http://www.smokey-services.eu/forum/viewtopic.php?f=70&t=12363&p=30633. I talked him through a simple version bump and he said it now compiles, installs and opens his volumes fine. If I can provide any more information, just ask. 5:)
Thanks!