Actually i have recently solved this kind of problem in case of uploading in case of I.E. Although I have strong knowledge in drupal 6 and 7. I have built sites from scratch and migrated a lot of sites from 6 to 7. So this is known to me functional changes and code changes in different version. Besides I'll assure you to deliver this project within deliver with error free.
Hi, i can fix your problem in one day.
I work all days with drupal and I've developed a lot of different websites with it.
This is my first reference so my price is lowest as possibile but i'm really good.