Yes. I am running iOS5 on an iPad 2. An associate is also having the same issue with the same content on an iPad 1. I also run iOS5 on an iPod Touch but the content works there.
I'm currently trying to delete and re-add the content on the iPad2.
From my limited testing I notice that the "sample content" files found in the models tab is the ones that are not showing up. Files that I have published to the Autodesk server is displaying correctly. Is this true in your case as well? Are you able to view the files that you have published to mobile?
I don't have anything published to the server. I can view the models in the "Gallery" but not the models I add through iTunes into the app's "Models" fiolder.
I tried deleting the models from the iPad and re-add them through iTunes and then sync. This results in nothing showing up in the app "Models" folder. I even restarted the app each time I tried something new. Meaning I double click the home button and remove the app from memory. I also tried a soft reset on the iPad 2.
As it sits now, I have no content loading to the app even though iTunes shows the content in the Add window. I can view the Gallery models. I have no published content but will try that next.
One last thing, I've been syncing tethered to a Macbook Pro. Not using the wireless sync.
Got it working on the iPad2.
Here's how I did it...
On the iPad, deleted the app from the iPad.
On the iPad, went to the Appstore and re-downloaded IPM Viewer
In iTunes, added my models
In iTunes, did a Sync.
Models show up as before.