Hello - thanks for the replies.
This is now the fourth time I've tried to post, as there seem to be some problems with your php database retaining content long enough to submit.
1 - Spybot - http://www.safer-networking.org/en/home/index.html
2 - IE. No problem reading instructions, thanks. I was very particular NOT to select K-M as my default browser. I'm picky that way, I like to make my own choices about what goes on my computer. In spite of manually resetting both at the Tools>>Options>>File Types menu and Open With>>Choose Program>>Always use this program etc. at individual file level, and being able to open in IE on request, I cannot now unassign K-M as the primary association for html and associated file types without it reverting back to default after a variable period of time.
In addition, I cannot change my icons back to IE ones (yes, I have deleted my icon cache, pressed F5, closed down, rebooted etc, etc, etc).
3 - Windows - Actually it's a brand new (less than a week old) install of XPSP2 which was running like a dream till I installed K-Meleon. There's a fair bit of software on there, each opening successfully with an application of my choice apart from web pages. The problem is only with K-Meleon.
So apologies, but I shall be uninstalling for the time being till I can be sure K-M is more stable. It's a pity, because I like the feel and simplicity of use, but it just isn't worth the extra hassle.