Hey Shish,
No problems at my end. I've only got one rig running but eating work units at the rate of about 15 - 20 a day and the server is keeping me topped up all the time.
I know their forum isn't the best for reasoned response but maybe one of our own experts here will come up with things to try to get more work units coming in.
Good luck mate, it would be a shame for our R@H team to lose your workrate.
Evo