About the aforementioned playlist behavior with cue sheets: now it correctly moves to the next track, but sometimes, after having played one from a regular file, it doesn't start the next one from a cue sheet, just stops playing.
When this has happened, Strawberry was not the active window; it had been some time without user interaction. The media files of the stopped tracks were both flac and mp3. I'll report if I find more info.
By the way, thanks also for fixing the UTF-8 encoding.