If your going to use "Apply to all ..." make sure that you select the Poser_Surface node, so that you don't lose the connections.
Follow up with a shift-click on the wacro button for "Remove Detached Nodes" to clean up.

The problem with "Apply to all ..." for most figures (any that use more than one map), is that your going to end up fixing some materials.

A utility like ShaderSpider is a must if you make controlled changes to many materials at once.