Thanks for the quick replies. I was worried that I wasn't clear in my original post, so I included two screenshots. The first time I I did the repair, I used version 1.2.6.7 of the CustomForge Song Manager. I only selected the "Repair 100% Mastery Bug" and converted about 6 files. They all seemed to lack the repeat chord symbol. I updated to the latest version of the CustomForge Song Manager (1.2.6.10) and ran the "Repair 100% Mastery Bug" with the "Add DD (if not already present)" option selected on replacements of the original files I converted. The result was the same as my first attempt, so I ran it again on the same files. Each time the 100% Mastery was reset to zero and after playing the song, I received a mastery score that reflected my actual achievement. The screen was really cluttered though, as you can see below. My file looked like this before the conversion: http://home.att.ne.jp/gold/hollow_man69/images/rocksmith02.jpg And like this after the conversion: http://home.att.ne.jp/gold/hollow_man69/images/rocksmith01.jpg Any further suggestions would be much appreciated.