diff -urp apachesolr-current/apachesolr.module apachesolr-patched/apachesolr.module
--- apachesolr-current/apachesolr.module	2010-09-01 18:33:33.000000000 +0200
+++ apachesolr-patched/apachesolr.module	2010-11-01 11:38:52.000000000 +0100
@@ -1695,12 +1695,17 @@ function apachesolr_l($text, $path, $opt
   $options['query'] += $get;
   $options_query = drupal_query_string_encode($options['query']);
   $url = $options_query ? url($path, $options_query): url($path);
-  
+  // Decode html entities before sending through check_plain
+  $text = html_entity_decode($text);
+
   return '<a href="'. check_url($url) .'"'. drupal_attributes($options['attributes']) .'>'. ($options['html'] ? $text : check_plain($text)) .'</a>';
 }
 
 function theme_apachesolr_unclick_link($facet_text, $path, $options = array()) {
   if (empty($options['html'])) {
+    // Decode html entities in $facet_text before running through check_plain().
+    // This helps to avoid double encoded apersands.
+    $facet_text = html_entity_decode($facet_text);
     $facet_text = check_plain($facet_text);
   }
   else {