Anyone else have proof of Domain Name Front Running?

This has come up a bit on HN. The registrar I used to use (still have a bunch registered) is based in Canada - did this to me last week. Searched for a name, 2 weeks later the registrar registered it to sell for more. I think this is despicable company behavior. Any recourse? From now on I'm only going to search for a new name from Icann and Cira in Canada.