According to Sembee (Exchange MVP) - these issues are fixed in 2007 SP1 Update Rollup 9
ref here
http://forums.msexchange.org/m_1800473006/mpage_1/key_/tm.htm#1800524322Download here
http://www.microsoft.com/downloads/details.aspx?displaylang=en&familyid=55320be2-c65c-48bb-bab8-6335aa7d008cMSKB on update rollup
http://technet.microsoft.com/en-us/library/ee221166(EXCHG.80).aspxverify your Exchange SP1 version by going to add remove programs, if you do not have that installed, please go ahead and install it.
thanks