Tablature note heads horizontal position (on Windows only?)
For the first two attached files: The .mscz file is the original v2 file. The .mscx file is file created by opening the .mscz in the latest master and saving as a new .mscx file. It does not matter if you click Yes or No to repositioning the elements when you open the v2 file in v3 MuseScore. It does not affect this positioning.
tabtest5.mscx is a newly created file using the latest master. It exhibits the same misalignment in MuseScore on Windows 10. The stems are not properly centered on the notes (or vice versa), and it is irregular, not every note, not by the glyph/char or font. It is as if it is a rounding error of some sort, but it looks like more than a 1 pixel error.
This is an issue carried over from v2 into v3. On Ubuntu Linux, I do not see this issue in v3 - the alignment looks pretty good. I am unable to test on Mac OS at this time.