diff --git a/theme/cornflower/styles_color.css b/theme/cornflower/styles_color.css
index 6a028f23bde..1989e934a27 100644
--- a/theme/cornflower/styles_color.css
+++ b/theme/cornflower/styles_color.css
@@ -673,7 +673,7 @@ table.message_search_results td {
   background: #F0F0F0;
 }
 
-.categoryheader {
+.glosarycategoryheader {
   background-color: #739FC4;
 }
 
diff --git a/theme/cornflower/styles_layout.css b/theme/cornflower/styles_layout.css
index 470ff659719..309b5ef79fe 100644
--- a/theme/cornflower/styles_layout.css
+++ b/theme/cornflower/styles_layout.css
@@ -1072,7 +1072,7 @@ body#mod-forum-search .introcontent {
 .entrylowersection .ratings {
   padding-bottom: 2px;
 }
-.categoryheader {
+.glossarycategoryheader {
   width: 95%;
 }
 .glossaryformatheader {
diff --git a/theme/cornflower/styles_moz.css b/theme/cornflower/styles_moz.css
index 2a23103bf0c..d757febb281 100644
--- a/theme/cornflower/styles_moz.css
+++ b/theme/cornflower/styles_moz.css
@@ -268,7 +268,7 @@ body#course-user .section {
 /***
  *** Modules: Glossary
  ***/
-.categoryheader {
+.glossarycategoryheader {
   -moz-border-radius-topleft:15px;
   -moz-border-radius-topright:15px;
 }
diff --git a/theme/metal/colors.css b/theme/metal/colors.css
index 6c7d75259a4..a213a6929a7 100755
--- a/theme/metal/colors.css
+++ b/theme/metal/colors.css
@@ -650,7 +650,7 @@ table.message_search_results td {
   background: #F0F0F0;
 }
 
-.categoryheader {
+.glossarycategoryheader {
   background-color: #dddddd;
 }
 
diff --git a/theme/oceanblue/styles_color.css b/theme/oceanblue/styles_color.css
index c2696515486..dc28e62bac1 100644
--- a/theme/oceanblue/styles_color.css
+++ b/theme/oceanblue/styles_color.css
@@ -761,7 +761,7 @@ table.message_search_results td {
 
 }
 
-.categoryheader {
+.glossarycategoryheader {
   background-color: #dddddd;
 }
 
diff --git a/theme/orangewhite/styles_color.css b/theme/orangewhite/styles_color.css
index 749a14c673c..0c49866b33d 100644
--- a/theme/orangewhite/styles_color.css
+++ b/theme/orangewhite/styles_color.css
@@ -627,7 +627,7 @@ table.message_search_results td {
 #mod-glossary-report .generalbox .teacher {
   background:#F0F0F0
 }
-.categoryheader {
+.glossarycategoryheader {
   background-color:#FFDA9D
 }
 .glossaryformatheader {
diff --git a/theme/standard/styles_color.css b/theme/standard/styles_color.css
index cace117ca0c..b91106d92c1 100644
--- a/theme/standard/styles_color.css
+++ b/theme/standard/styles_color.css
@@ -864,7 +864,7 @@ table.message_search_results td {
   background: #F0F0F0;
 }
 
-.categoryheader {
+.glossarycategoryheader {
   background-color: #dddddd;
 }
 
diff --git a/theme/standard/styles_layout.css b/theme/standard/styles_layout.css
index 4647017f799..29b455dc2d4 100644
--- a/theme/standard/styles_layout.css
+++ b/theme/standard/styles_layout.css
@@ -2820,11 +2820,12 @@ body#mod-forum-search .introcontent {
   border-width:1px;
   border-style:solid;
   border-collapse:separate;
+  margin-left:auto;
+  margin-right:auto;
   margin-bottom: 5px;
   text-align: left;
 }
 
-
 .entrylist {
   border-width:0px;
 }
@@ -2832,23 +2833,31 @@ body#mod-forum-search .introcontent {
 .entrylowersection {
   padding-top: 10px;
 }
+
 .entrylowersection table{
   width: 100%;
 }
+
 .entrylowersection .aliases {
   text-align:center;
 }
+
 .entrylowersection .icons,
 .entrylowersection .ratings {
   text-align:right;
   padding-right: 5px;
 }
+
 .entrylowersection .ratings {
   padding-bottom: 2px;
 }
-.categoryheader {
+
+.glossarycategoryheader {
   width: 95%;
+  margin-left:auto;
+  margin-right:auto;
 }
+
 .glossaryformatheader {
   width: 90%;
 }
@@ -2869,7 +2878,6 @@ body#mod-forum-search .introcontent {
   text-align: left;
 }
 
-
 .glossarycomment .entry {
   padding: 3px;
 }
diff --git a/theme/standard/styles_moz.css b/theme/standard/styles_moz.css
index ac29d4a7189..57a07adac4b 100644
--- a/theme/standard/styles_moz.css
+++ b/theme/standard/styles_moz.css
@@ -262,7 +262,7 @@ body#course-user .section {
 /***
  *** Modules: Glossary
  ***/
-.categoryheader {
+.glossarycategoryheader {
   -moz-border-radius-topleft:15px;
   -moz-border-radius-topright:15px;
 }
diff --git a/theme/wood/styles_color.css b/theme/wood/styles_color.css
index 4a45440874d..d9ac4d5835a 100644
--- a/theme/wood/styles_color.css
+++ b/theme/wood/styles_color.css
@@ -311,7 +311,7 @@ form.mform fieldset,
 
 #admin-index .c0,
 #admin-config .c0,
-.categoryheader {
+.glossarycategoryheader {
     background-image:url(background.jpg);
     background-position:bottom;
     background-repeat:repeat;