diff --git a/src/main/scala/util/JGitUtil.scala b/src/main/scala/util/JGitUtil.scala
index ee8043d..669330e 100644
--- a/src/main/scala/util/JGitUtil.scala
+++ b/src/main/scala/util/JGitUtil.scala
@@ -61,11 +61,15 @@
         rev.getParents().map(_.name).toList)
 
     val description = {
-      val i = fullMessage.trim.indexOf("\n")
-      if(i >= 0){
-        Some(fullMessage.trim.substring(i).trim)
-      } else {
+      if(shortMessage == fullMessage){
         None
+      } else {
+        val i = fullMessage.trim.indexOf("\n")
+        if(i >= 0){
+          Some(fullMessage.trim.substring(i).trim)
+        } else {
+          None
+        }
       }
     }
 
diff --git a/src/main/scala/view/helpers.scala b/src/main/scala/view/helpers.scala
index e7d060a..9af5c36 100644
--- a/src/main/scala/view/helpers.scala
+++ b/src/main/scala/view/helpers.scala
@@ -26,6 +26,18 @@
     Html(Markdown.toHtml(value, repository, enableWikiLink, enableCommitLink, enableIssueLink))
   }
 
+  /**
+   * Converts issue id and commit id to link.
+   */
+  def link(value: String, repository: service.RepositoryService.RepositoryInfo)(implicit context: app.Context): Html =
+    Html(value
+      // escape HTML tags
+      .replaceAll("&", "&amp;").replaceAll("<", "&lt;").replaceAll(">", "&gt;").replaceAll("\"", "&quot;")
+      // convert issue id to link
+      .replaceAll("(^|\\W)#([0-9]+)(\\W|$)", "$1<a href=\"%s/%s/%s/issues/$2\">#$2</a>$3".format(context.path, repository.owner, repository.name))
+      // convert commit id to link
+      .replaceAll("(^|\\W)([a-f0-9]{40})(\\W|$)", "$1<a href=\"%s/%s/%s/commit/$0\">$2</a>$3").format(context.path, repository.owner, repository.name))
+
 }
 
 /**
diff --git a/src/main/twirl/repo/blob.scala.html b/src/main/twirl/repo/blob.scala.html
index 3078a52..0d4a8cc 100644
--- a/src/main/twirl/repo/blob.scala.html
+++ b/src/main/twirl/repo/blob.scala.html
@@ -21,7 +21,7 @@
         <div class="pull-left">
           <a href="@path/@latestCommit.committer" class="username">@latestCommit.committer</a>
           <span class="description">@helpers.datetime(latestCommit.time)</span>
-          <a href="@path/@repository.owner/@repository.name/commit/@latestCommit.id" class="commit-message">@latestCommit.shortMessage</a>
+          <a href="@path/@repository.owner/@repository.name/commit/@latestCommit.id" class="commit-message">@helpers.link(latestCommit.shortMessage, repository)</a>
         </div>
         <div class="btn-group pull-right">
           <a class="btn btn-mini" href="?raw=true">Raw</a>
diff --git a/src/main/twirl/repo/commit.scala.html b/src/main/twirl/repo/commit.scala.html
index 2ab694f..0d289b3 100644
--- a/src/main/twirl/repo/commit.scala.html
+++ b/src/main/twirl/repo/commit.scala.html
@@ -12,9 +12,9 @@
         <div class="pull-right align-right">
           <a href="@path/@repository.owner/@repository.name/tree/@commit.id" class="btn btn-small">Browse code</a>
         </div>
-        <div class="commit-log">@commit.shortMessage</div>
+        <div class="commit-log">@helpers.link(commit.shortMessage, repository)</div>
         @if(commit.description.isDefined){
-          <pre class="commit-description">@commit.description.get</pre>
+          <pre class="commit-description">@helpers.link(commit.description.get, repository)</pre>
         }
         <div class="small" style="font-weight: normal;">
           @if(branches.nonEmpty){
diff --git a/src/main/twirl/repo/commits.scala.html b/src/main/twirl/repo/commits.scala.html
index 19fc66c..7828579 100644
--- a/src/main/twirl/repo/commits.scala.html
+++ b/src/main/twirl/repo/commits.scala.html
@@ -30,13 +30,13 @@
       <tr>
         <td>
           <div class="pull-left">
-            <a href="@path/@repository.owner/@repository.name/commit/@commit.id" class="commit-message" style="font-weight: bold;">@commit.shortMessage</a>
+            <a href="@path/@repository.owner/@repository.name/commit/@commit.id" class="commit-message" style="font-weight: bold;">@helpers.link(commit.shortMessage, repository)</a>
             @if(commit.description.isDefined){
               <a href="javascript:void(0)" onclick="$('#description-@commit.id').toggle();" class="omit">...</a>
             }
             <br>
             @if(commit.description.isDefined){
-              <pre id="description-@commit.id" style="display: none;" class="commit-description">@commit.description.get</pre>
+              <pre id="description-@commit.id" style="display: none;" class="commit-description">@helpers.link(commit.description.get, repository)</pre>
             }
             <div class="small">
               <a href="@path/@commit.committer" class="committer">@commit.committer</a>
diff --git a/src/main/twirl/repo/files.scala.html b/src/main/twirl/repo/files.scala.html
index 403ac88..596917f 100644
--- a/src/main/twirl/repo/files.scala.html
+++ b/src/main/twirl/repo/files.scala.html
@@ -14,12 +14,12 @@
     <table class="table table-file-list" style="border: 1px solid silver;">
       <tr>
         <th colspan="4" style="font-weight: normal;">
-          <a href="@path/@repository.owner/@repository.name/commit/@latestCommit.id" class="commit-message">@latestCommit.shortMessage</a>
+          <a href="@path/@repository.owner/@repository.name/commit/@latestCommit.id" class="commit-message">@helpers.link(latestCommit.shortMessage, repository)</a>
           @if(latestCommit.description.isDefined){
             <a href="javascript:void(0)" onclick="$('#description-@latestCommit.id').toggle();" class="omit">...</a>
           }
           @if(latestCommit.description.isDefined){
-            <pre id="description-@latestCommit.id" class="commit-description" style="display: none;">@latestCommit.description.get</pre>
+            <pre id="description-@latestCommit.id" class="commit-description" style="display: none;">@helpers.link(latestCommit.description.get, repository)</pre>
           }
         </th>
       </tr>
@@ -59,7 +59,7 @@
         }
         </td>
         <td>@helpers.datetime(file.time)</td>
-        <td><a href="@path/@repository.owner/@repository.name/commit/@file.commitId" class="commit-message">@file.message</a> [<a href="@path/@file.committer">@file.committer</a>]</td>
+        <td><a href="@path/@repository.owner/@repository.name/commit/@file.commitId" class="commit-message">@helpers.link(file.message, repository)</a> [<a href="@path/@file.committer">@file.committer</a>]</td>
       </tr>
       }
     </table>