Not a bug.... but

BxBaseProfileView.php has these two classes:

class BxBaseProfileView extends BxDolPageView

class BxBaseProfileGenerator extends BxDolProfile

However, in BxTemplProfileView.php we have only this:

class BxTemplProfileView extends BxBaseProfileView

Why no: class BxTemplProfileGenerator extends BxBaseProfileGenerator ?

It makes it not quite as straightforward to override functions in the BxBaseProfileGenerator class. All I want to do is override     function showBlockCover, but I'm uncertain as to exactly how to do it in this case.

The only thing it does is call a function that happens to be in another class. There is nothing stopping you from creating a new function in the same class to which you than point to.

return $this->oProfileGen->showBlockCover('', true); becomes

return $this->showBlockCover('', true); // modified function

There is already an issue for this:

https://github.com/boonex/dolphin.pro/issues/94