Hmm, something seems to have gone wrong with my c4a setup, and I've no idea what it is. On playing Nub nub! or Tumiki Fighters my score doesn't seem to be getting uploaded any more according to c4a.openpandora.org 's Latest Activity indicator, or the monthly scoreboards for each game. Clearly I was once able to do this, as I have an entry in the all-time Nub nub! scores (made November last year apparently), but now no more. I was able to upload a Mr. Do score to test out my c4a registration, and that uploaded fine, I've just not been able to upload any scores for the games in this month's competition.
I've tried this using a USB wifi dongle to make sure my connection doesn't drop out intermittently. Tumiki Fighters claims that even if my connection is out when I quit one time, the next time I quit when online it'll upload then. I think my score it getting saved in it's score table, but as it doesn't seem to accept a name to register against, it took me a while to spot my last score in the table.
It's not too significicant that I'm not able to register my scores currently, as I'm not scoring anything particularly challenging at the moment, but it's a curiosity nonetheless.