I decided to install FreeBSD 7.0-RELEASE in a VMware VM tonight since it was just released, and while the installation went smoothly I soon discovered that leaving the MBR of a fresh VM untouched was the wrong thing to do.
Both my network monitoring servers suffered this condition over the 2wks my company takes holidays for Christmas so I returned to work to find 2 VMs consuming 6ghz of CPU between them. A quick check of top showed mysqld_safe consuming 100% CPU on both VMs for no apparent reason.
I extracted a tarball which had applied 777 (rwx) permissions to all files and directories that it contained. I wanted to set all files to 644 and all directories to 755, but there were too many levels to do it manually so I needed to do it through a shell script.