Reproduce:
1. Open Ccleaner
2. Go to the registry scanner
3. While scanning click and hold on an empty space within the box that shows the registry issues.
4. Still holding down your mouse bring the cursor up to the part that says "Problem, Data, Registry Key"
5. Hold it there till the scan is finished (I do not know if this works if there is an issue detected)
6. Let go now the scan is finished, the box will be there even when you have let go.
http://img251.imageshack.us/img251/5569/16499741.png