Upload tab don’t display thumbnails

Hello,

Since I’ve moved my blog to an onther domain,
“manage”>”uploads” and the upload tab when writing a new post, isn’t displaying the thumbnails (and isn’t saying that there are thumbnails), but only the original sizes.
What I’ve done:
– moved files
– changed domain at the options page
– search (old domain) and replace (with new domain) the values in the database

The posts (and thumbnails in posts) all works again, after the search and replace.
At new uploaded files, it displays also a thumbnail.
Only with the older files, it doesn’t…

(Sorry for my bad English, I’m Dutch 😉