we have a group called R&D

when I "goto Manage Groups" then select "R&D" I get

http://compacwiki/admin/users/domembersofgroupsearch.action?membersOfGroupTerm=R%26D

which is all good.... However, when I click on Next, to see the next lots of users in the group... I get.........

when browsing to http://compacwiki/admin/users/domembersofgroupsearch.action?membersOfGroupTerm=R&D&startIndex=10

which causes it to say
-------------------
Viewing the members of group: R

Browse Groups
No users found.