I received an error while attempting to export a signed .apk file using the Android Development SDK in Eclipse. The error was incorrect AVA format. A few quick google searches didn't result in anything useful, but it turned out that this means the format of the data I provided for the certificate contained unacceptable characters. In my case, I had used a comma inside the Organization name. Removing the comma from this name fixed the problem and allowed me to fully export my signed .apk file.