I was just going to post that another new build is out.
http://www.dd-wrt.com/site/support/o...ink-dir615d%2F
ftp://dd-wrt.com/others/eko/BrainSla...dlink-dir615d/
After some further tweaks to the settings, build 14684 is running really well for me at the moment, so I'm going to stick with it.