I have the same problem described here with the wordpress importer (wordpress to wordpress), about the attachment "guid" not being generated as a link to the file itself, but instead as a link to the "attachment ID"
With the result that I'm now unable to browse the uploads file in the admin section (just a square with the name of the file)... If I click on this name of the file to see it's link, again, there is no link to the file itself, but to the attachment ID...
It's weird, because when I open the XML file exported from wordpress in notepad++, I really see the "guid" as a link to the file itself (http://yourdomain.com/wp-content/uploads/2007/07/pic.jpg) but when it is imported in the database, it appears as a link to the attachment ID... (http://yourdomain.com/?attachement_id=78)
Worst... I use the post-image plugin from Kaf, wich rely on the "guid" information to display attachment images.
I'll maybe find a workaround, but I wonder if this is not a bug in the import function ?
I saw some tickets in trac.wordpress about a guid problem with the RSS importer :
But nothing about the attachment guid with the WordPress importer...
1) It is a normal behavior ? If so, then, there is a problem because all the links of the uploads are now useless, along with the manage uploads panel.
2) Does anybody could imagine a quick fix for this... ?