Won't make a problem. Even thought the encripted IPL and the modules lightly changed from 3.5x series in Slim, 3.60M33 is out, isn't it?
We are working on the next cfw right now.
By the way, we have heared that there are someones in english forums saying that they are part of M33, and that is false. HM33 is the only user of M33, and it's only registered here, on pspx.ru. Others are false.