I've recently been reading a learning a little about the K-Meleon web browser.
While educating myself about it, I came across some mentions of the PortableApps.com version on the official K-Meleon forums: http://kmeleonbrowser.org/forum/read.php?19,148500,page=17
Regarding the version available on PortableApps.com, one frequent poster (maybe a K-Meleon contributor, I don't know), wrote: "Nothing that isn't here [on kmeleonbrowser.org] or in the roytam's site is the version it pretends."
Given the history of PortableApps.com being very upstanding (and outstanding!), I'm guessing this is not true.
It's possible that someone here may find it worthy to communicate on that forum to ensure that false information is not being spread.