OJ Board

I'm having the same problem (using Firefox 2.0.0.11 on Linux). Clearing the private data doesn't help.

There is also a mincost maxflow algorithm based on the push-relabel idea:
http://citeseer.ist.psu.edu/goldberg92efficient.html
I have implemented it (without the heuristics) and tested it on problem 10746. See:
http://www.cs.utexas.edu/~apetrov/acm/alg/mcmf/