I've personally never suffered from dreaded single color frames in neither HDV or EX mxf clips, but I just received my nanoFlash, and - much to my disappointed - I see ALL clips (so far only testing 100 Mbps mxf) have the very first frame displayed as solid green.
This is most obvious on 9.0c 64bit, a bit less so on 9.0c 32bit, and absent on Vegas Pro 8.0c.
Anyone interested to check and comment please see this thread (there is a 2-frame clip uploaded):
http://www.dvinfo.net/forum/convergent-design-nanoflash/469373-nano-clips-vegas-9-0c.html
Any comments?
Piotr