The debug key should only be used during development. You shouldn't distribute any application signed with this key. In fact Google Play will reject APKs signed with the debug key.
See this short guide: Signing your application before uploading to Android market
The problem with the debug key is that it is the same key for all developers. This might cause antivirus software to mistakenly consider your app as malware.
See this short guide: Signing your application before uploading to Android market
The problem with the debug key is that it is the same key for all developers. This might cause antivirus software to mistakenly consider your app as malware.