As per Jennifer Whalan's email to dspace-tech:
"On any of the authors, which have a comma, or I am assuming any other non-alphabet character, if you change either one of the sort-by, order or number of results and then click update, the page it displays has no items showing, and it seems to be using the encoding of the comma. You can try it here: http://www.territorystories.nt.gov.au/browse?value=Aagaard%2C+Jane.&type=author."
The same issue is appearing on my (1.6.0 snapshot) test instance at:
My suspicion is that either some 'auto URL encoding' is taking place in Cocoon 2.2 that didn't happen in Cocoon 2.1, or we're not decoding correctly when populating hidden form fields for configurable browse (odd, since we're displaying a clean version at that stage..)