I've been unable to get any cgminer version after 3.3.1 to start on Win7 x64, using the pre-built binaries. I get the message "Error opening terminal: dumb"
3.3.1 works fine with identical configuration, but I'd rather not be stuck on an old version.
Unrelated to cgminer. Google for it, seems to be related to some windows environment variable with various solutions offered.
Thanks. Out of curiosity, any idea why it only effects more recent versions?