Your markup is invalid:
<img width=100 height=100 border=1 data-bind "attr:{ src:
^
missing an equals sign
It may be possible that the browser is trying to turn the data-bind
attribute value into part of an attribute name, thus stripping out the non-alphanumeric characters.
Also, you should always use quotation marks around your attribute values:
<img width="100" height="100" border="1" data-bind="..." />