Version 0.7.10 (20070831)
Windows 7 (64 bit)
Since KompoZer does not allow option of adding CSS comments I used a text editor to add comments/notes to my CSS.
Once I was done, I used KompoZer to view my HTML page and tweaked the CSS.
When I saved the CSS using KompoZer it removed all the CSS comments/notes I had made earlier.