Question about the interface classes

[Richard]

> That's true. Currently the plugin check is very strict and every  
> update of Qt
> requires you to recompile your plugins.

An application that links with e.g Qt-4.4 will still be able to load  
plugins build with e.g Qt-4.3. But a specific verion of Qt will not  
accept plugins build with newer version of Qt (even if only the  
maintainance version differ). And you cannot mix release/debug versions.

-Ric