You can talk about issues with k-meleon here.
K-Meleon doesn't close properly sometimes
Date: November 04, 2011 11:27AM
I've had this issue since KM 1.5.4, I think, and just never really posted about it. Windows 7, x64 (but was also happening when I had Windows 2000 x32). Sometimes when I close K-Meleon, the window closes but the process stays active. I only notice if I try to restart K-Meleon - the computer works for a moment, but nothing happens. I have to kill the kmeleon.exe task before I can start up K-Meleon again. Then it always comes up with the "K-meleon didn't exit properly..." message. Has anyone else experienced this?
I don't know the causes for this issue, but I expect it's related to either specific websites or just sheer volume of sites visited per session. If it's of any use, I currently visit Armor Games (lately I've played a lot of GemCraft Labyrinth), a couple different email accounts, Science Daily, and the ReactOS Forum.