I'll have to check into the PageLoader.  I know I moved 
some stuff around, so that the engine property would be 
set by the time that finishLoad() was invoked on a page, 
or any component of the page.  I must have screwed 
something up there.  Strangely, I do run Tapestry with 
caching enabled but I haven't seen this!

--
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> Hello all,
> 
> I'm using 2.2b2, and seeing a very annoying effect:
> 
> I visit a page, leave it for a while (visit some other pages, wait...),
> and then come back and get a NullPointerException. This isn't my error
> (though I may be causing it), since it's a null ENGINE! In fact, I've
> subclassed BasePage and overridden attach(), in order to determine what's
> going on, and it was never called. So in effect, I'm operating on a page
> that hasn't been attached. How can this be? Has anyone else seen this
> phenomenon?
> Any pointers would be appreciated...
> 
> -Jason
> 
> 
> 
> 
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