"there was a prob*em parsing the package" when installing my app

view story

http://stackoverflow.com – I had to reinstall my computer. Now, when I'm launching my app from Eclipse on the virtual device, it works fine. However, when I create a distribution, the .apk file is only half the size it used to be so far and gives a "There was a problem parsing the package" error message when trying to install the fresh .apk on my phone (Android version 4.1.2). My manifest contains <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="15" /> I have the latest Android SDK tools etc. as well as API v8, v15 and v17 installed. In "Project Build Target" (project properties), API (HowTos)