I think Chris said there was a bug with the note acceptors on MPU5 machines, so you would need to disable it until the bug is fixed. Just go into the Configuration Window, and set 'NV4 Note' to 'No'. I had to do a ram clear to get rid of the Strim errors. This was on the classic version, and not the DX version.
I had disabled the notes, but was hoping not to have to ram reset to get rid of the coin strim. Might just avoid playing it for now and hopefully a future update, will sort it out.
We have the superb Oche Oche Oche DX for a bit of darts action now.