Image (link) overlay questions

seems to be a matter of image size ( all-inkl is only 116px of height – all others have more) –
i don’t know where the display: none comes from. maybe there is a height limit for that in code.
you can force to show it by:

.image-overlay.overlay-type-extern {
    display: block !important;
    top: 0;
}

but as i see you want to get rid off all overlay effects.
Why is a css solution not wanted by you? give a custom class to those images …

i found something here on avia.js on line 735

if(outerH > 100)
{
	
	if(!overlay.length)
	{
		overlay = $("<span class='image-overlay "+span_class+"'><span class='image-overlay-inside'></span></span>").appendTo(link);
		
	}
	//can be wrapped into if !overlay.length statement if chrome fixes fade in problem
	if(link.height() == 0) { link.addClass(_self.className); _self.className = ""; }
	if(!linkCss || linkCss == 'inline') { link.css({display:'block'}); }
	//end wrap
	
	overlay.css({left:(pos.left - overlay_offset) + parseInt(current.css("margin-left"),10), top:pos.top + parseInt(current.css("margin-top"),10)})
		   .css({overflow:'hidden',display:'block','height':outerH,'width':(outerW + (2*overlay_offset))});
		   
	if(cssTrans === false ) overlay.stop().animate({opacity:opa}, 400);
}
else
{
	overlay.css({display:"none"});
}

but this does not help you i know