11.1(6) seemed to have a severe memory leak problem on 7505's in my
environment (OSPF, BGP). I didn't call the TAC, but when I upgraded to
11.1.(7-CA1) it went away.
It works for us (OSPF and BGP also), but now that you've brought it up, I
suspect things will soon start crashing everywhere.
Time to surf the bug database again...
-Peter