Hi,
I used your button in this url:
http://www.photoshipment.com/share/?id=1
This is a development site.
However...
When I tried to tweet the above link, your button failed.
It can recognize only "http://www.photoshipment.com/share/" part.
It misses the "id=1" part.
Please give a try and test.
Can you please fix your button?
Please check and let me know your feedback.
Thanks.
Tanzilo