Refinements not working with special characters
A property value with a special character, such as ampersand (&), apostrophe (‘), or asterisk (*), will cause an error during attempt to refine by that value.
The MOSS index can crawl these special characters, and also can return them when Ontolica queries for Refiners. Clicking on a Refine By option adds that value to the search. Attempting to search using these special characters will produce an error.
The issue is related the SQL language syntax used by the MOSS index. There is no workaround for the problem at this time.