@ Light: I assumed you were using GP5. TuxGuitar (to my knowledge) does not suffer from this problem. However, the fix is relatively simple and if you let me know what song it is, I probably already have a corrected version for my own personal use.
@ Captn: Something that happens because of a typo in the score or if is audibly different from what is played in the song. I've corrected a few score typos while tabbing and usually leave a note like that.
Anyway,
Midnight Superstar is done. As expected from the jazzy Jun, the song is full of neat instrumental flourishes and motifs that make it a pain to tab. Of course, they're also the reason why I like it so much. Diary is my next target.