Kenmore vacuum cleaner causing carpet to melt

Hello,

For the last 6 months we have noticed spots that looked like glue

stains on our carpet. We could not figure out were they came from. We

used a commercial carpet cleaner to see if we could get rid of these

spots. I did not work.

Every month a few more appeared. Then we finally put two and two

together and figured out that our vacuum cleaner was causing this.

While using the vacuum cleaner I looked behind me and noticed three

large spots that were not there before I started to vacuum that day.

Since the spots were larger I could tell that the carpet had melted.

I would like to know from if there are any other complaints like this

out there so that I have something concrete to complain about the

Sears. Our Kenmore vacuum cleaner is model number is 116.22749C

Purchased in Oct.07

I would grateful for any comments or suggestions.