== Test plan == 1. search something in the OPAC 2. open the RSS feed/copy the URL 3. validate it: https://validator.w3.org/feed/ 4. you will get something like: XML parsing error: <unknown>:16:48: not well-formed (invalid token) <link>/cgi-bin/koha/opac-search.pl?idx=kw&q=MY_SEARCH_QUERY_HERE&format=rss2</link> It seems that the equal sign needs some escaping. I heard there were escape changes in the last few versions. Is that related? The version 16.11 is said to not have this issue (although testing on a 16.11 demo gives the same result) As someone who was consuming the RSS feed couldn't anymore when switching from 16.11 to 18.11 There are still escape differences between these versions even if the first error is still here. Here are the differences if that helps. 18.05 <link>/cgi-bin/koha/opac-search.pl?idx=kw&q=lea&format=rss2</link> <atom:link rel="self" type="application/rss+xml" href="/cgi-bin/koha/opac-search.pl?idx%3Dkw%26q%3Dlea&sort_by=acqdate_dsc&format=rss2"/> 18.11 <link>/cgi-bin/koha/opac-search.pl?idx=kw&q=lea&format=rss2</link> <atom:link rel="self" type="application/rss+xml" href="/cgi-bin/koha/opac-search.pl?idx=kw&q=lea&sort_by=acqdate_dsc&format=rss2"/> «idx=kw&» vs «idx=kw&» «idx%3Dkw%26q%3D» vs «idx=kw»
Possibly caused by bug 21526..?
*** This bug has been marked as a duplicate of bug 16111 ***