Hey, its not a question, its a solution.
WordPress was generating bad links to gravatar images and it was able to show only pictures of registered emails at gravatar. No images for unregistered emails - no Identicon, no Wavatar, no even a "default" image - just empty ugly frame in place when image should be.
Link to gravatar images contained ?amp;d=%3Cpath_to_url%3E - which is definitely bugged.
To solve this, go to themes/eximius/ open functions.php and search for
<?php echo get_avatar($comment,$size='60',$default='<path_to_url>' ); ?>
Replace it with
<?php echo get_avatar($comment,$size='60' ); ?>
Now links are generating correctly and all gravatars shows ok.
Above problems started after upgrading to 2.2, so previous versions (don't remember which i have used) should be bug free.