What do you mean with "several days"? 2 days, a week, a month, 123 days?
What Windows version are you using?
What webpages are open and how many of it?
I have KM 1.5.4 running some weeks, and some time for a long of a month, without any shutdown (K-Meleon closed) problem. Finaly I had to restart the system but this is because I'm using Windows not because I'm using K-Mele
Forum:
Bugs