diff --git a/public/site_assets/mobile/images/questionmark.png, b/public/site_assets/mobile/images/questionmark.png,
new file mode 100644
index 00000000..f3405a01
Binary files /dev/null and b/public/site_assets/mobile/images/questionmark.png, differ
diff --git a/public/templates/mobile/global/sidebar_pps.tpl b/public/templates/mobile/global/sidebar_pps.tpl
index 0d325b23..fc4093df 100644
--- a/public/templates/mobile/global/sidebar_pps.tpl
+++ b/public/templates/mobile/global/sidebar_pps.tpl
@@ -24,12 +24,12 @@
                       <td align="right">{$GLOBAL.roundshares.valid|number_format}</td>
                     </tr>
                     <tr>
-                      <td><b>Pool Invalid</b><font size='1px'> ({(100 / $GLOBAL.roundshares.valid * $GLOBAL.roundshares.invalid)|number_format:"2"}%)</font></td>
-                      <td align="right">{$GLOBAL.roundshares.invalid|number_format}</td>
+                      <td><b>Pool Invalid</b></td>
+                      <td align="right"><i>{$GLOBAL.roundshares.invalid|number_format}</i>{if $GLOBAL.roundshares.valid > 0}<font size='1px'> ({(100 / $GLOBAL.roundshares.valid * $GLOBAL.roundshares.invalid)|number_format:"2"}%)</font>{/if}</td>
                     </tr>
                     <tr>
-                      <td><b>Your Invalid</b><font size='1px'> ({(100 / $GLOBAL.roundshares.valid * $GLOBAL.userdata.shares.invalid)|number_format:"2"}%)</font></td>
-                      <td align="right">{$GLOBAL.userdata.shares.invalid|number_format}</td>
+                      <td><b>Your Invalid</b></td>
+                      <td align="right"><i>{$GLOBAL.userdata.shares.invalid|number_format}</i>{if $GLOBAL.roundshares.valid > 0}<font size='1px'> ({(100 / $GLOBAL.roundshares.valid * $GLOBAL.userdata.shares.invalid)|number_format:"2"}%)</font>{/if}</td>
                     </tr>
                     <tr><td colspan="2">&nbsp;</td></tr>
                     <tr><td colspan="2"><b><u>{$GLOBAL.config.currency} Estimates</u></b></td></tr>
diff --git a/public/templates/mobile/global/sidebar_prop.tpl b/public/templates/mobile/global/sidebar_prop.tpl
index 18fec375..1dbcf3f5 100644
--- a/public/templates/mobile/global/sidebar_prop.tpl
+++ b/public/templates/mobile/global/sidebar_prop.tpl
@@ -15,17 +15,17 @@
                       <td><b>Pool Valid</b></td>
                       <td align="right">{$GLOBAL.roundshares.valid|number_format}</td>
                     </tr>
-                    <tr>
-                      <td><b>Pool Invalid</b> <font size='1px'>({(100 / $GLOBAL.roundshares.valid * $GLOBAL.roundshares.invalid)|number_format:"2"}%)</font></td>
-                      <td align="right">{$GLOBAL.roundshares.invalid|number_format}</td>
-                    </tr>
                     <tr>
                       <td><b>Your Valid<b></td>
                       <td align="right">{$GLOBAL.userdata.shares.valid|number_format}<font size='1px'></font></b></td>
                     </tr>
                     <tr>
-                      <td><b>Your Invalid</b> <font size='1px'> ({(100 / $GLOBAL.roundshares.valid * $GLOBAL.userdata.shares.invalid)|number_format:"2"}%)</font></td>
-                      <td align="right">{$GLOBAL.userdata.shares.invalid|number_format}</td>
+                      <td><b>Pool Invalid</b></td>
+                      <td align="right"><i>{$GLOBAL.roundshares.invalid|number_format}</i>{if $GLOBAL.roundshares.valid > 0}<font size='1px'> ({(100 / $GLOBAL.roundshares.valid * $GLOBAL.roundshares.invalid)|number_format:"2"}%)</font>{/if}</td>
+                    </tr>
+                    <tr>
+                      <td><b>Your Invalid</b></td>
+                      <td align="right"><i>{$GLOBAL.userdata.shares.invalid|number_format}</i>{if $GLOBAL.roundshares.valid > 0}<font size='1px'> ({(100 / $GLOBAL.roundshares.valid * $GLOBAL.userdata.shares.invalid)|number_format:"2"}%)</font>{/if}</td>
                     </tr>
                     <tr><td colspan="2">&nbsp;</td></tr>
                     <tr>
diff --git a/public/templates/mobile/statistics/pool/authenticated.tpl b/public/templates/mobile/statistics/pool/authenticated.tpl
index a7025779..0d0252e6 100644
--- a/public/templates/mobile/statistics/pool/authenticated.tpl
+++ b/public/templates/mobile/statistics/pool/authenticated.tpl
@@ -18,7 +18,7 @@
     </tr>
     <tr>
       <td class="leftheader">Pool Efficiency</td>
-      <td>{(100 - (100 / $GLOBAL.roundshares.valid * $GLOBAL.roundshares.invalid))|number_format:"2"} %</td>
+      <td>{if $GLOBAL.roundshares.valid > 0}{(100 - (100 / $GLOBAL.roundshares.valid * $GLOBAL.roundshares.invalid))|number_format:"2"}{else}0{/if} %</td>
     </tr>
     <tr>
       <td class="leftheader">Current Active Workers</td>