Why is tethering to Linux no longer working?

After a while of using windows and osx I now need to tether from iphone 4s to Linux (Fedora) PC. I know it used to work with same pc software around ios version 6. For some reason it no logner works with ios 7.0.4. After plugging the iphone in using usb cable the phone displays 'trust this computer' prompt and after touching 'trust' it displays same message again. It goes on indefinetely. As a result I cannot tether (neither cable nor bluetooth) and access pictures.

Have some security mechanisms been introduced in ios 7 recently? Perhaps someone knows if there is a way to access iphone from Linux PC?

Linux forums I have browsed do not seem to have an answer to that as it seems to be a fresh issue.