An extremely frustrating bug
Try any query of the form
find terms that ... the [value] <blah> in Ancestor that can be reached via 
the pick list constantly resets itself to 'Any type', so that is is impossible to scroll down to choose a relation further down the list.
This is particularly obvious with the Drosophila anatomy ontology
( http://obo.cvs.sourceforge.net/viewvc/obo/obo/ontology/anatomy/gross_anatomy/animal_gross_anatomy/fly/fly_anatomy.obo?pathrev=HEAD )
which now has quite a long list of relations.
Note - that these types of queries are extremely useful and are unique to OE - there's no other way to do them apart from resorting to scripting. So, not being able to do them is a big loss.
OE 2.1.1-beta6 (also seen in 2.1) running at 64bit on OSX 10.6.8,
djs93% java -version
java version "1.6.0_29"
Java(TM) SE Runtime Environment (build 1.6.0_29-b11-402-10M3527)
Java HotSpot(TM) 64-Bit Server VM (build 20.4-b02-402, mixed mode)