What is "generated but not accepted interest"? Still there after 3.0.1 upgrade.
If you are getting multiple of these in a row and no actual interest it can indicate an actual problem, you should wipe your block chain and resync so that the 3.0.1 upgrade can take proper effect.
what MaNI said, it can indicate a problem on your local blockchain. when you reset the blockchain you should also always clear your peers.dat file!