I have come across a similar problem, and from memory it was one particular page that caused me RAM issues at the time, regardless of which of the lightweight Webkit browsers I tried. From memory, I think it was a large media site, like The Atlantic magazine.
I prefer surf, as it has caused me no issues, RAM or otherwise (and I only have 212MB to play with)
There are a few patches available through http://suckless.org
and it is similar to dwm to customize by editing the config.h file.
There is a SlackBuild for it too, unlike some of the others.