We have a few customers who are developing Universes against BEx and then after the Universe is "cleaned up" and objects are hidden and/or modified....something on the backend is modified requiring a refresh of he unv structure. Some examples of things that happen when the developer hits refresh..
-hidden dimensions are unhid
-Moves dimensions out of folders added for grouping.
-Added duplicate folders at top level.
-Disconnects hierarchies between dimension items and corresponding detail
Business Objects is saying that is a known issue, but I wanted to test the waters out there to see if anyone has come up with a good workaround or practice....or have heard promissing news.