This will work in 2.2 now as well as 3.0

diff --git a/catalogue/detail.pl b/catalogue/detail.pl
index 6779128..7e2b6bd 100755 (executable)
--- a/catalogue/detail.pl
+++ b/catalogue/detail.pl
@@ -19,6 +19,9 @@ my ($template, $borrowernumber, $cookie)
                             });
 
 my $biblionumber=$query->param('biblionumber');
+if (!$biblionumber){
+    $biblionumber=$query->param('bib');
+    }
 $template->param(biblionumber => $biblionumber);