working with Attachment module?

I haven't tested it with the attachment module. I would think that it's not compatible, and since there is currently no 6.x version of the attachment module, I don't have any plans right now to make it compatible with that module. If you use attachment.module, maybe you can also enable upload.module to be able to use ipaper.module? If you really need to use attachment.module, it should be easy to change ipaper_transfer() and ipaper_upload() to work with $node->attachments instead of $node->files.

The changes to 6.x have all been backported to the 5.x (although I will probably discontinue that as soon as there is a stable release). Let me know if there is a specific feature that you do not see in the 5.x.

Rareş