We've released a minor update to fix 2 of the major sources of crashes in the dedicated server. The client and server are both now 1064.
We've noticed a larger frequency of crashes on the x64 dedicated server binaries compared to the x86. We highly recommend try switching to the x86 server, and see how that affects stability.
A larger bugfix update is in the works to fix the crop of small issues and annoyances since launch, and will be available at a later.
EDIT: We also bumped up the client version to allow listen servers to be listed in the browser, and updated the server browser to start displaying servers when getting the full list more quickly.