Unread marks?

I have a small clustered environment with two Domino 6.5.4 servers both
running on a single iSeries V5R2 and only about 600 mail users. What
happens is when someone fails over to the secondary clustered server, there
unread marks are completely skewed. I then get calls from users asking why
there read email is showing up as unread. They never even noticed that they
have switched to another server which is really cool (and why I went to the
clustered environment).............. but there email does not look the same
(based on the unread marks). I guess my question is, has this been
addressed in Domino 7? and why has this been overlooked for so long? Maybe
it has already been addressed in a fix pack that I am not aware of? Any
input would be greatly appreciated.

Thanks,
Scott Reece
System Administrator
City of Bend
sreece@xxxxxxxxxxxxx
Office - 541-388-4426
Pager - 541-318-7680

"Once you say you're going to settle for second, that's what happens to you
in life. "  --JFK