Fishing a bit here, but did you say you were on v3.4 firmware? The latest is v3.10.1, so it's possible those newer apps might be incompatible?

Edit: you know what, I think that the appstore would probably filter out those apps that your model/firmware doesn't support before you get to this point. There might be alternative versions of apps for different cases.

And also, here's something we haven't seen on Sailfish before. Music track progress! Working but messy, will clean up and release.