Umm.....Something about the bugs of this game to introduce.
The Taiko series on PSP has 3 bugs which can effect the score. These bugs are not fixable.
One is named "GO-GO-BUG" --- When a note is set at the end of go-go-time area (#1) , if you hit it as normal, it will count as a non-go-go-time note. But if you hit it a little bit earlier, it will count as a note within the go-go-time area, so you can get an extra 20% score on that note if you hit it earlier and also get the "良(Great)" mark (which called "Catch the GO-GO-BUG").
This bug appears on many songs. For example No.21 "Mura Matsuri" in Oni group, it has 3 GO-GO-BUGs, if you catched them all you will receive a maximum 3,280 extra score than normal playing. So the max score of this song in Oni group is raised to 705,920 (= 702,640 (#2) + 3,280. This song has no yellow bars so the max score is fixed).
Another bug is called "Autoplay big notes missing". It only appears on few songs. Such as No.37 "When the Saints Go Marching In" in Oni group. The Autoplay result is 1,047,800 but the last big note is hit as a small note, so it caused a 1,400 score loss of that note.
The last bug is called "Go-go-time area changement". It only appears on No.60 "Koibumi2000" in all groups. This song's go-go-time area start point may be randomlly moved earlier.
(#1) when you hit the notes in the go-go-time area, you are getting 120% score from each note than non-go-go-time area.
(#2) Autoplay result of that song in Oni group. Autoplay don't catch GO-GO-BUGs.
ref. in Japanese:
http://www.geocities.jp/nobu_pc2004/portabl2/pota2-tenzyo.html
