New member here with installation report. I downloaded the ISO image for Mint 15 and booted from the DVD with no problems. I played around a little with it and decided to load it on my old Dell laptop. The install went smoothly until I hit the "re-boot" button. The computer appeared to shut down but got stalled with a message in a strange looking box that said:
"Broadcast message from root@mint
(unknown) @ 19:18
The system is going down for reboot NOW!
modem-manager : <info> Caught signal 15,
Shutting down . . . "
After a minute or so, the DVD drive popped open but no other message appeared. The system stayed in this state for an extended time until I forced a shut-down with the Power Button. Upon restarting the computer, it did not offer a dual boot system, but went straight to Windows 7. I tried several times but got the same result (Definition of insanity . . . ) . An examination of the disk's partitions showed that Mint 15 was in fact adding partitions to the hard disk. I Googled "Caught signal 15" but didn't find anything useful.
I finally gave up and downloaded/Installed Mint 13. I'm happy to report that the install went smooth as glass and the laptop boots up Mint 13 or Windows 7 perfectly.
(also new to Linux)