We have moved to Deadline because of this issue.
I have used Backburner with great frustration for 15 years.. this year I finally took the plunge and canned it. Backburner is now, in my opinion, non-functional and we recently paid £2k for Deadline. The cost is high but when I calculate the time that our team and I have saved, it is a no brainer. I took me a really long time to make the decision to change as we're a small studio and it's a big expense. I didn't want any additional functionality from Backburner.. I just wanted renders to complete without generic, unhelpful error codes.
Every Autodesk employee that I have spoken to over the years has told me Backburner isn't a priority to their users and no further development would be carried out. I'd like to repeat here again, this is incorrect. A basic, network render manager is absolutely a priority to most 3ds max users. Sorry for preaching.
Also, for anyone having issues with Backburner and using Vray... I've just started submitting jobs from 3ds max as Vray Standalone (via Deadline). This bypasses 3ds max and renders only on Vray Standalone. Almost all of our network render errors are causes by 3ds max exceptions. Using Deadline fixed a lot of the errors but now we don't get any render failures using Vray Standalone.