I noticed that the current testing version does not properly handle 2D QR-vcards, the new contact is just empty for me and the shown info in mbarcode is missing lines. The devel version does extract an 1D code from the same 2D QR-vcard, and each time I scan another code shows. Open jpg or png does not show an unable to open error in devel but it does not open it just like the testing version.