Was playing with one new module, which icon is one 32x32 gif file.

It shows ok everywhere (course, module settings, admin->plugins...) but in the navigation block (image attached).

The cause it that everywhere else, the class "activityicon" is used (16px), but the navigation block, that uses "smallicon" and "navicon" that seem to be undefined completely, hence the original image is shown.

So, 1) or we add the "activityicon" class to the activity images in the navigation block, or 2) we define one of "smallicon" and "navicon" classes to enforce some "good" size.

Ciao