[Brando]

I agree with stomachmonkey that it depends on how the provider 'moved' the site. If it was granting you access to the installation, then it may have been broken all along but you would have never known.

It could also be a recent WP update - updating WP Core has been known to sometimes break editors and layouts with themes that are not up-to-date as well. If you want to send me a PM with the info I can take a look and see.