SocialBookmarking tag - missing image in Chrom browser only

[map_1961]

It's a current 2.1.6 cmsms install using SocialBookmarking tag (http://dev.cmsmadesimple.org/projects/socialbks)
The tag call is like this:
{SocialBookmarking submitto="facebook|twitter|google|" plusone="1" plusone_lang="de" real_url="1" target="_blank"}

It works fine so far but only in Chrom browser a missing image appears with a link to the root url. The source code for this is:
<a href="" title="" rel="nofollow" target="_blank">
<img src="images/socialbookmarking/" alt="" title="" width="32" height="32"/>
</a>

Using Firefox ore IE you don't see this - only with Chrome.
You can see here: http://luftbildvideo.mp-p.de

Who has an idea how to solve?

Thx

MAP

I just want to state that this forum is very active and more than helpful in many many cases. Lots of thanks to all te capable people in here...

[velden]

Why this last pipe character?

{SocialBookmarking submitto="facebook|twitter|google|" plusone="1" plusone_lang="de" real_url="1" target="_blank"}

[map_1961]

Thanks Velden.
The issue is solved with your hint.

One more my encomiumto this forum and everyone postimg ansers!!

MAP