The previously mentioned problem with attachment posts is related to a permalink bug in WordPress. Permalinks containing categories (e.g., /archives/%category%/%postname%/) will pose problems for any attachment posts. This is due to the fact WordPress does not allow category management for these posts and thus they end up in the uncategorized category. If this category is not the primary category of the parent post, then the resulting permalink will break. A fix may already exist for 2.2. Regardless, I’ll keep digging into this so that 2.3 will not contain this problem.

-John Havlik

[end of transmission, stay tuned]