I'm currently running 3/30 nightly. I couldn't get 4/2 to flash. I actually ran in to multiple issues when I was trying to flash to CM9. I was getting signature verification errors, install aborted code 7 issues, and it ended up being that the file i downloaded (update-cm-9-20120402-NIGHTLY-galaxys2-signed.zip) was the wrong file for my phone. When I clicked on 'Devices' at the top of the page and selected Samsung Galaxy S2, it assumes that I have the i9100. I didn't realize that on the left side of the downloads page, there was a selection for i777. I figured that out after 4 hours of trouble shooting, re-rooting, trying to update CWM Recovery (which I am still unable to do, even through ROMManager). I'll upgrade to ROMManager Premium and update CM9 through that once I get that on Thursday.