I haven't used facelets, but I use clay. There was recently a problem on the shale mailing list sort of related to this. I guess way back in myfaces 1.1.1 component ids were generated in sequence per-request. The internal sequence was always reset even after a view restore. Post 1.1.1 it seems the ids were stored with the view. So they would be reclaimed instead of regenerated on a postback (when the view was restored before render). Now, with JSF 1.2 the ids are now generated by the the container for JSP tags implementing JspidConsumer (JSP 2.1). I am not sure if myfaces 1.1.5 uses this technique?
Anyway, the latest clay is overloaded to handle these 3 component id techniques. So the version of myfaces + the version of clay is very important in diagnosing the issue. I would think this might be the same for other view handlers like facelets. I would make sure to put both library versions in your JIRA issue. You might also want to check out SHALE-418 just in case these issues are related.
