Wow, that doesn't seem at all typical of K-Meleon! By comparison, with nothing but about:blank loaded, my task manager only shows about 23,000 kb of memory in use and a 0% CPU load. This is just after startup. What version of KM are you using, and on what operating system?
Also, had the browser just started, or had you been visiting a lot of sites before going to a blank page?
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