bird 100% load

I am triing to use bird 1.0.7, in my linux distribution based on uClibc, as routing daemon in network where neigbours are serviced by zebra (quagga). After few second after bird starts it consumes cpu runtime to nearly 100%. This seems to last forever. From debug messages I do not see anything unusuall to happen. Most values is set to default. I am using only protocols static and ospf. It also seems quagga's ospfd has some troubles comunicate to bird and crashes sometime, but this is not confirmed. Any ideas? Adam Pribyl