Not really an issue, but since 5.2 is out now, I notice that Qt Creator autocomplete gives me the option of importing either QtQuick 2.0 or 2.1 or 2.2.
My old code is importing QtQuick 2.0, some newer parts are importing 2.1, and now I could import 2.2.

Is there a best practice here? Would it cause problems if some files are importing different versions of QtQuick? Does it cause more memory usage?

Would it be good practice since I'm now using Qt 5.2 to change all imports to QtQuick 2.2? What is the risk of changed behaviour by changing the import version?

Any thoughts appreciated.