My posts weren't incrementing when a user uploaded a picture in 2.2. I fixed it and wanted to share it with you. Around line 200 in submit.php, change:

$xoopsDB->query( "UPDATE ".$xoopsDB->prefix('users')." SET posts=posts+'$myalbum_addposts' WHERE uid='$submitter'" ) ;

to:

$xoopsDB->query( "UPDATE ".$xoopsDB->prefix('user_profile')." SET posts = posts +'$myalbum_addposts' WHERE profileid='$submitter'" ) ;