http://k-dev.net/cgminer/I have absolutely no affiliation to this person, so if something happens as a result of using this, you're on your own

haha. But I found it on the middlecoin thread and have been using it the last week and it's basically eliminated any coin-switch disconnects for me and averages around 870Khs on my 290x and 310Khs on my 6870. Rejects are usually under 5% as well