Did you switched to Full or Full+ recently?
I have made some modifications to the plugin and uploaded them to the repository. You can find and download them as the current Development Version.
This version will print out the Strings which are used by the dashboard widget of podPress to retrieve the download numbers from the db. In your blog this db query has probably some kind of problem. Which I can only analyse and fix if I know these query strings.
My problem is that I could not reproduce this problem in my test blogs. That means that the problem seems to occur only under special circumstances which exist coincidently in your blog.
That is also the reason why it would be great if you could install the Development Version, switch to Full again, go to the dashboard, copy and paste the additional output here or maybe better with the help of one of the pastebin service like pastebin.com.
Since all the modifications are in the file podpress.php you need only to update this file.
I can not fix this without your help. I appreciate any help of you!
Thanks,
Tim