I have not seen any errors from build 39.
These error messages appear always on some partitions. There may be something wrong with them (metadata not fully compliant with NTFS standard for instance), but version 19 works fine with them. The change of consolidate algorithm is also bothering me, so I decided to stay with this version. In any cases, it's very easy to upgrade to build 39 and to revert to build 19, I just have to install the corresponding build, and settings are preserved.
I have not reported the "errors" to disktrix because I just don't feel like it, I spend already too much time using software that work, I don't want to add time for software that don't. Unless it's critical.