Not sure if bug or if supposed to be here

I love Comodo products, but I seem to encounter a problem or a bug when using the Comodo Online Scanner. Everytime, I try and scan My Computer with my U3 Launchpad flash drive in or just try to scan the U3 flash drive itself, I get a freeze and have to end IE, since it doesn’t work under FF atm. I was just wondering if this is normal, a bug, or if flash drives are not supported to be scanned via the Online Scanner.

Thank you in advance for any info and keep up the good work!