First of all, I have found a compatibility issue between AmiStart and many recent AROS nightly builds. I don't know exactly why, but trying to change settings of AmiStart's applications folders, and even creating a new one, leads to a crash of AmiStart itself and an AROS general slowdown. It's like the system get stuck while trying to open the setting window. I noticed this behavior both in sept-27th nightly build and even in the system files I personally compiled from the AROS sources two days ago. Using today's nightly build files, however, fixed the issue.
A second issue I found is related to AutoDocReader. It's nice we finally have it, however the AROS versions seems to have some issues with its GUI. You can find a nice screenshot here. I've already had similar problems with other apps in the past, but I simply forgot how I resolved them. Custom MUI classes are already at their place, so I don't know exactly what to do to fix this. Any help is really appreciated.