Applications built for different QT versions

[wysota]

Aren't Qt releases with the same major version number supposed to be compatible?

No, that's true about minor version. They are binary compatible (both ways).

So it should be possible to replace an older release with a newer one (if not, I would consider this a bug...)

Yes, it's possible this way (at least should be) as Qt keeps backward binary compatibility across minor versions too.

[rexi]

Yes, it's possible this way (at least should be) as Qt keeps backward binary compatibility across minor versions too.

Ok, I did express myself wrong This was what I actually meant. I just forgot the little word "backward". Replacing an old version with a newer one should work, the other way round obviously does not, because of added features in newer versions, as you already stated.