I had the following problem with fragments: If a page is reloaded, the field of a fragment get a Stale-Exception. This is different to fields directly on a page. So I think it's a good idea that the field are always searched from scratch (as long as they are not have the annotation @CacheLookup).
This is broken for list and for fragments. Specially together with ajax this can become a problem.

I looked into the code and find that ElementImpl can easily do the search. Now ElementImpl works as Proxy. This has the positive side-effect that not for each method-call a new Object is created. The generic proxy looks wrong for me.

So I decided to change the implementation. Know everything works like a charme and should be faster as before.