You may have mistakenly applied an 8.0 CHF on a 8.0.1 CF server, and not realize it!
Note: This blog post is from 2009. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.I just helped a customer today solve a problem where he swore he had applied the latest Cumulative Hotfix (CHF) for CF 8.0.1, but I showed him that instead he had mistakenly applied the CHF for 8.0. I know how it happened, and showed him. I hope how you can avoid the same mistake.