I get an interesting message from BFGMiner 2.10.5 under ubuntu while doing solo mining:
[2013-02-16 10:31:46] Cannot append template-nonce to coinbase on pool 0 (-1) - you might be wasting hashing!
[2013-02-16 10:31:46] Cannot append coinbase signature at all on pool 0 (-1)
Using bitcoind for servers... Now, I have the same configuration running under window 7 against the same bitcoind's with no problems (i.e. Blocks are created and posted to the correct wallet). It only gives me this error under ubuntu. (btw, it's amd-64 client)
Tired of buying Window licenses, any clues?
Is this using the PPA package, or self-compiled? If the latter, from tar or git? If the latter, is it possible you forgot to run autogen.sh in a long time and might have an old version of libblkmaker?