When generating the RSS feed, opac-opensearch.tt escapes amperstamps in query_cgi but not limits_cgi Steps to reproduce : 1 - Go to advanced search in opac 2 - Make a research only on a selected item type (books for example) 3 - Click on the RSS button => the generated rss is invalid with amperstamp not escaped (firefox will fail at displaying it)
*** This bug has been marked as a duplicate of bug 37801 ***