I just finished setting up the JumpBox Drupal Beta. The new runtime is a big improvement, however, I do see a couple problems.
1) The timestamps in the Drupal log appear to be the wrong timezone. I selected America:NY in the JumpBox setup but the logged timestamps are showing events 3 hours earlier than they actually happened.
2) The Drupal status report logs a warning saying "Unable to fetch any information" about available Drupal updates. All the other status report fields are green. Proxy & network information for JumpBox is correct.
I hope you JumpBox folks are monitoring this area and will get back to me soon.