The same type of message on a computer means the program you are trying to start did not close properly when yo last used it. It won't start again because it is actually still running in the background from the last time you used it.
I've noticed my quicklaunch freezing as well on os 7 9900 (os leak 353). I don't get that message though, it just freezes and is in my list of running apps but can't access it
Have to hold the menu button to get to home screen and then have to reboot to get ql working again
Posted from my CrackBerry at wapforums.crackberry.com