We received a purple screen error on our esxi 5.
After checking on google we found this error is common in ESXi 4 and fixed in ESXi 4.1. refer below.
(http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=201304...)
Not sure why this came up in esxi 5
Screen shot attached.