Some user images switched after upgrade I'm working on an upgrade process, and I've noticed something strange when I upgrade my D6 site to 7. I've noticed some behavior that's kinda odd, and was wondering if anyone one else had experienced something similar in their upgrades.

1: Some users have the their avatars in the "file_managed" table, uri field set to: 
sites/default/files/user-pictures/...

These are the correct pictures, but they won't work with image styles unless I switch the value of uri to be the correct uri format. Any ideas why some of the images wouldn't get switched to the proper uri formate durring a 6-7 upgrade?

2: Some users have the completely wrong avatar. The avatars aren't even necessarily other user's avatars, though some of them are, but some are just images from site pages. For example, user 55 in D6 had an avatar at picture-55. After upgrading, I find no record of an image with the file name of picture-55 in file_managed, the user table says his user image is set to a file with an fid of 20, which is in attached images. 

I've got a lot of users, so making sure the avatars mach up correctly is important. I would appreciate any help in figuring what's causing this/how to fix it.
Drupal 6 did not have {file_managed} at all. Also, user profiles wasn't really fieldable. And both styles and fields changed between 6 and 7. 3 big changes affecting one value - that's bound to create problems.

To get around it, you can use Views Data Export to expose users from old site, and then import your users back using for example Feeds


  Import or aggregate data as nodes, users, taxonomy terms or simple database records.


with Feeds Image Grabber


  an addon for Feeds module, which grabs image for each feed-item from their respective webpages and maps it to an image field