[Evolution] "Match All" vfolder option

[Iain Buchanan <iaindb netspace net au>]

What does the "Match All" vfolder match do?  (right click on vfolder,
properties, add).  It has no arguments, and when I select it, I get this
error when refreshing my vfolder:

Error while Storing folder 'recent'.

Cannot parse search expression: Unexpected token encountered: 35:
 (match-threads "all"  (or
  
       (match-all (> (get-received-date) (- (get-current-date) 172800)))
    
  
     (match-all (not (system-flag  "Seen")))
    
  
        (#t)
      
  )
)
.

everything right up to and including the '.'!

A quick google didn't turn up anything of interest, and I couldn't see
it documented in the help either.

TIA,
-- 
Iain Buchanan <iaindb netspace net au>