leaving feedback dilemma

when I attempt to leave feedback it tells me that I must enter a "comment" but I AM doing that. I asked Joey the moderator about this & he replied that my browser might be too full. I am a computer newbie & not sure what that means but on the chance that it was that I have too many saved sites (I click on the neg sign to save sites I want to easily access to) I deleted a bunch of em to no avail. any info/thoughts on how I might resolve this? thank you for your time. RR