Here are some tips for reporting bugs.
First, you should be precise. Try to describe the problem precisely, listing each step, which finally results in an error. We will try to reproduce this bug, so the more detail you describe, it would be easier for us to do this.
Next thing, include only one problem in one topic. It is important, because if we want to have good base of problems on forum we need to have independent topics with bug.
Describe your problem:
Version of GrandNode:
Did you make any private modifications of GrandNode?:
Version of MongoDB:
Any other informations, that might be helpful? Remember that it is better to write more, not less.: