Update: Installing the Google Chrome Frame plugin helps in more ways that this! If you have any trouble accessing your account or your holds, try installing the Google Chrome Frame. We have a 100% success rate at this point!
A couple of tips: Use IE and click on the link above to get the Frame. Run the installation. After completely, close IE and restart. If you have any other errors accessing your account, be sure to clear your temporary internet files and restart IE. (Clearing the temporary internet files hasn't been necessary in most cases.)
Original Message: Some users are having a strange error show up in their account >> bookshelf. I only have a very small screenshot provided by a patron, but it appears to be a "format and availability..." error that is covering the download buttons.
I've reported the problem to OverDrive and will post their response or solution here.