I found 2 issues:
1 - it crashes on close (using Alt+F4). Not sure if it's because I'm using linux though.
the crash says something about winmm. my guess is that the music is not stopping in time.
(this issue is not very important)
2 - the F1-dialog quickly appears when starting the game, then hides.
This causes a small issue when running under fullscreen, the real FF8 window doesn't get focus so it doesn't start until I do a mouse click (thus selecting the FF8 window).
Not sure what can be done to fix this, perhaps you can force the FF8 window to get focus/attention? or not show the F1-dialog at startup?
apart from those small issues, it seems to be working great!