Media Gallery showing odd URL's

Hi all..

My site was recently moved to a new host (about 3 weeks ago) and shortly after that we all had troubles with items in the media gallery showing weird links…
https://sitename.org/?attachment_id=2466
instead of
https://sitename.org/wp-content/uploads/2009/08/chain2.jpg

It cleared up for me a few days later after I mentioned it to the web designer, so I assumed it was fixed. However, one of the ladies in my group still gets the same URL’s, and now the web designer said she didn’t fix anything.

Any ideas on what it could be and how to fix it? It’s a pain in the rear to not be able to post photos!

thanks!

carrie