Maybe it's because they can only test it at work?
Also... the mouse and the interface don't sync anymore. The cursor (graphic) is "synced" with where the cursor is (where the app thinks it is) at the top left corner, but the more you go down or right, the larger the desync between the two. To hit Exit from the main menu, the mouse has to be more than halfway down the screen. Most likely SDL too.
The black screen issue is very low priority IMO. I mean, we can work around it very easily so don't lose sleep over it. There are other issues that are higher priority since they affect either the sound or the workflow (although these are also very low priority in the grand scheme of things. they can be worked around easily)
1- Oscillator + Wave + Filter = Cracking noise from hell if the volume is set too high (usually starts around 80). This has been the case since you fixed the problem with super low wavetable volume. I don't know if it should be fixed though... Fixing this will mean yet another moment when older songs will not be played as they were originally composed. I know you shouldn't stop progress for the sake of backwards compatibility, but yknow.. just be careful how you fix this one if you get around to it?
2- Going in and out of the application to multitask sometimes "locks" the editing cursor in the sequence editor. If you press Enter to bring it back down into the patterns, it goes down and then right back up into the sequencer. You basically can't leave the sequence editor until you press ESC and cancel whatever pop up that provoked. Haven't found solid repro steps yet, but it definitely has to do with leaving the app and returning to it. It's annoying as balls when it happens, but it seems to have very specific conditions for it to happen since it doesn't naturally happen very often. If you really want to, I can investigate properly and find you a repro for it.
And while I'm here trying to find stuff to nitpick about:
1- The E.Start parameter in the FM section should probably be where the ATK is, and take ATK and SUS down a row. Just for clarity's sake.
2- Press ESC when there has not been any changes made since the last save shouldn't auto-quit the app without a little "you sure bro?" popup.
3- Would be cool if those little buttons in the FX section's delay could be locked on the tempo. Yknow like when you adjust ms (or ticks) on a delay tap, you get this button that approximates how many pattern rows that is? And if you click on it, it will set the ms/tick value to exactly what's needed? If you change your song's tempo (spd, or rate) these settings will stay as they were and won't be synced anymore. Would be cool if they changed so that whatever ms/tick setting was good for 4 rows before remains good for 4 rows with the new tempo. No idea how complicated this would be to add, but yknow.. it'd be cool to have. Did I say it would be cool? Yeah it would be cool. Cool.
4- Would be nice to be able to load and save FX units.
5- A semi-compact editing mode where the channel you're on is not compact, but the others are fully compact (just the note column)
6- Add panning commands to the volume column? FT2 had that, and it was super useful at times when you needed to pan something and still have it do other funky stuff at the same time. Right now you have to do it from the instrument itself, and sometimes that means duplicating an entire instrument just to add a panning command to it.
7- I think the option to launch klystrack in debug mode should be included in every version. Like "klystrack.exe -debug" or something. Just so you don't have to make a special version when you run into a specific weird problem that you can't repro on your side.