What the heck are all these .onebin files?

Hi All,

I have a SharePoint 2010 document library with numerous subfolders, containing lots of Office 2010 documents. We use this document library to store customer information and to track issues. Many of these subfolders contain OneNote 2010 notebooks which are frequently updated. Technicians go onsite and link to these notebooks using the full OneNote client from their laptops (or via Office Web Apps) as they travel from site to site.   If we install a new piece of software at a customer site, for example, we capture the configuration using a series of screenshots and sync with the hosted notebook. Works like a champ.

But I've noticed a lot of extra files at the root of the document library:

The files have an extension of .ONEBIN, which I googled and learned very little. If you click on any of these files you discover that they are mostly embedded images, screenshots pasted into various notebooks.

My theory is that normally OneNote would store this file under its own hidden subfolder, but in this case where subfolders already exist, the OneNote client isn't smart enough to determine which subfolder a notebook is stored in, so it puts the binaries at the root of the doc library and links to it from there.

Also, the document library is tracking Major versions, which might also be a factor.  I thought I read somewhere that OneNote didn't get along with versioning, but can't remember where I saw it.

Everything is working and this isn't an emergency, but it's confusing to open a doc lib and see all those GUIDs. Is there anything I can do about this? Or, is there a view I can create to filter out all the .Onebin files?