This message appeared on the RCN site yesterday about the very short WUs:

Here is my hotfix for the problem with the ultra-short WU's: Currently all machines of our institute pre-process the remaining 322 000 WU's and kill the job if it takes more than 3 seconds. It seems that doing that we can _locally_ solve >70 percent until tomorrow. The remaining longer WU's will be put to the server on monday and you are likely to get the new WU-length-feeling on Thuesday or Wednesday when the old ones are finished.
Seems like a wonderfully simple idea.