Looks like it's time to upgrade for me. http://www.cisco.com/web/software/Wireless/Deferral/Deferral_Notice_7_0_98_0.html
*Wireless Control System (WCS) software version 7.0.98.0 is being deferred due to the following issue :* * **CSCtj21464 - WLC data plane core crashes, causing WLC reboot* ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.