Cache current size greater than max size

I’m running OF 3.8.2 Alpha out of SVN (as of a day or two ago), along with Hazelcast clustering. I noticed this morning some of my caches are showing >100% utilization. Is this a bug, or an artifact of the clustering (although, I assumed caches were replicated between nodes rather than distributed).

Last Activity Cache
0.12 MB
0.44 MB
351.7%
100.0%

Roster
10.00 MB
46.31 MB
463.1%
57.3%

User
0.50 MB
0.63 MB
126.6%
47.3%

java -version

java version “1.6.0_24”

OpenJDK Runtime Environment (IcedTea6 1.11.5) (rhel-1.50.1.11.5.el6_3-x86_64)

OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)