here is my URL
http://abc.domain.com/controller/action/A74444C3A7FA858C7995CA9954CBCF1E26604634767C5575396D908E8415CF8CCC04C05F49FED0AA9D9743B69ABF232BDE9787A5222D081DA6
The final path segment is likely to be too long.
See: http://social.msdn.microsoft.com/Forums/nl/netfxnetcom/thread/723e6bfd-cab7-417b-b487-67f1dcfa524f