First, let me congratulate you on an awesome piece of work.

Concerning bugs and user contributions, I think we are a bit behind.
Won't it be possible to host this on github and establish an efficient bug tracking system, so community members can contribute to the core code?
Maybe a list of TODOs.

So far, there are a few bugs I found, but the system of reporting is too tedious for devs, since they will need to replicate and then fix.

Also, I am not too glad to fix them cause I will have to upgrade sooner or later and then lose the fixes.

Maybe it is time to move to git and allow this awesome piece of work to grow.