[Interest] Assistant's documentation list is reset when reinstalling Qt?

[René J. V. Bertin]

Hi,

Here's something that's been bugging me: Each time I install or reinstall Qt4 or 
Qt5 (Linux style "system-style" install, e.g. through under Linux or through 
MacPorts) the documentation list available in the Assistant is reset.

That's a user-specific setting AFAIK; I can still imagine that it gets reset if 
its format of filename is linked to the Qt version. But not when you reinstall  
the same Qt version.

So why does this happen, and what can be done to prevent it?

R.