I did a single CVS checkin yesterday and ended up with 29 entries for it in My Changes. Two of these were for other projects which the change affected also. But there were 27 for one project. Same time and same file, so not an instance of same checkin message.
On another checkin, I see similar, though not as extreme repeats. In this case, there were just 2 identical entries for one project and one checkin.