No images have been removed.
Probably problem in your theme.
Forget that, the author picture was coming from another plugin.
Suggestion: add the author picture to your plugin
Do not coming from another plugin.
It is generated by the Gravatar.
The same system that WordPress uses for all who is the image of the author and comment…
Unable to accept you suggestion since WordPress uses this as the default.
So we will work with the standard.
The plugin use this function to get the image: http://codex.wordpress.org/Function_Reference/get_avatar
See?
No “another plugin”.
