Originally posted by HooKooDooKu
I don't know for sure, but it's the only thing that makes sense. Why unexpectedly change cabin numbers when they have already been assigned?
After all, if I've picked to stay in my favorite Cat 6 cabin, I'm going to be pretty pissed if I get my docs and find I've got a free upgrade to a random Cat 5 (Cat 5 = Cat 6 except Cat 5 is on a higher deck).
Sure there will be extream situations where someone assigned to a cabin gets upgraded (such as a maintainence situation closes the assigned cabin for the trip).