I have a few visualforce pages I'm developing to be inline on a standard page layout.  

I can get my pages to dispay the normal validation rule errors if they are displayed on a specific field in <apex:pageMessages/>. 

However, if the validation rule error is supposed to be displayed on "Top of Page", it doesn't display anywhere.  I am guessing the errors want to display at the top of the standard page layout (not visualforce portion) but because the error is happening when i try to click what is essentially a quicksave button on the VF part it never gets to that step.

Does anybody know what I might be doing wrong or how to overcome this?

Here is my controller class:

public class OppVFPageSaveExtension
{

ApexPages.StandardController stdCtrl;
//global variables
private final Opportunity objOpportunity;
//end of global variables

//standard controller constructor     
    public OppVFPageSaveExtension(ApexPages.StandardController controller)
    {
    
    this.objOpportunity=(Opportunity)Controller.getrecord();
    stdCtrl=Controller;
    }
    //End of Standard Controller Constructor
    
    public Opportunity getOpp()
    {
     return (Opportunity) stdCtrl.getRecord();
    }
    
    //Method Called on to update Holiday
    Public PageReference save()
    {
    try
    {
    Update objOpportunity;
        PageReference OppPage=new PageReference('/'+getopp().id+'?inline=0');
         OppPage.SetRedirect(true);
         return OppPage; 
    }
    catch(System.DMLException e)
    { 
    return null;
    }
    Return NULL;
    }
    //end of Method Update Oppty
    
   }

 Here is my VF Page:

<apex:page standardController="Opportunity"  showHeader="true" tabStyle="Opportunity" extensions="OppVFPageSaveExtension">
<style>
         .activeTab {background-color: #E4C030; color:white; background-image:none}
         .inactiveTab { background-color: lightgrey; color:black; background-image:none}
</style>

<!--This part here is just for getting conditional qualification info on the opp, if required.  Otherwise it doesn't render-->
<apex:pageMessages />
 <apex:outputPanel id="QualPageBlock" rendered="{!(Opportunity.z_Has_this_opp_had_QualChecklistComplete__c == 0 && Opportunity.Does_Opp_Require_Qual_Profile__c == 1)}" >

  <apex:form >
 <apex:pageBlock title="Qualification Checklist" id="none">
  <apex:pageBlockButtons >
<apex:commandButton action="{!save}" value="Quick Save Changes"/>
</apex:pageBlockButtons>
<apex:pageMessages />
 <!--<apex:pageMessage severity="error">
 <apex:Messages />
 <apex:pageMessages />

 To access all the opportunity fields, please submit the following "Qualification Checklist".  
 <br/>
 The picklists are required; the details fields are optional</apex:pageMessage>-->

 <apex:pageBlockSection columns="3">
  <apex:OutputText >1. Are we the first in (are we setting the vision)?  If yes, describe the vision.</apex:OutputText>
 <apex:pageBlockSectionItem >
 <apex:inputField value="{!Opportunity.Qual1_AreWeFirstIn_PL__c}" required="true" style="text-align: left !important;padding-left: 2px !important;padding-right: 2px !important; width:98%;" >
<!--<apex:inlineEditSupport event="ondblclick"/>-->
</apex:inputField> 

 <apex:pageBlockSection columns="1" title="Please Select Strategic Business Impacts" id="SBIs">
 <!--<apex:inlineEditSupport event="ondblclick"/>-->
 <apex:inputField value="{!Opportunity.SBI_ICS__c}" />
 <apex:inputField value="{!Opportunity.SBI_IC__c}" />
 <apex:inputField value="{!Opportunity.SBI_IP__c}" />
 <apex:inputField value="{!Opportunity.SBI_IR__c}" />
 <apex:inputField value="{!Opportunity.SBI_IE__c}" />
 <apex:inputField value="{!Opportunity.SBI_DTTP__c}" />
 <apex:inputField value="{!Opportunity.SBI_ETR__c}" />
 <apex:inputField value="{!Opportunity.SBI_TFP__c}" />
 <apex:inputField value="{!Opportunity.SBI_CS__c}" />
 <apex:inputField value="{!Opportunity.SBI_CP__c}" />
 <apex:inputField value="{!Opportunity.SBI_Inn__c}" />
             </apex:pageBlockSection>
</apex:PageBlock>
      </apex:form>
</apex:outputPanel>


<!-- This is the default tabbed portion of the display and is also condition but is there most of the time -->
 <!--<apex:pageMessages />-->
 
       <apex:tabPanel switchType="client" selectedTab="name2" id="theTabPanel" tabClass="activeTab" inactiveTabClass="inactiveTab" 
       rendered="{!(Opportunity.z_Has_this_opp_had_QualChecklistComplete__c == 1 || Opportunity.Does_Opp_Require_Qual_Profile__c == 0)}">
       
          <apex:tab label="Field Sections">
             <apex:tabpanel switchType="client" tabClass="activeTab" inactiveTabClass="inactiveTab">         
            
          <apex:tab label="Relevant Personnel" name="Relevant_Personnel" id="ReleventPersonneltabFieldSet">               
             <apex:include pageName="Opp_ReleventPersonnelFieldSet"/>
          </apex:tab>

          <apex:tab label="Win/Loss Info" name="Win_Loss_Info" id="Opp_WinLossInfo">               
             <apex:include pageName="Opp_WinLossInfo"/>
          </apex:tab>
          
          </apex:tabPanel> 
          </apex:tab>
          
          
          <apex:tab label="Opportunity Team" name="Opportunity Team" id="TabTeam" rendered="{!(Opportunity.StageName <> 'Finalist')}">
             <apex:relatedList subject="{!Opportunity}" list="OpportunityTeamMembers" />
          </apex:tab>
          <!--<apex:tab label="Opportunities" name="Opportunities" id="tabOpp">
             <apex:relatedList subject="{!Opportunity}" list="opportunities" />
          </apex:tab>-->
          <apex:tab label="Strategic Account Plan" name="StrategicAccountPlan" id="tabSAPs">
             <apex:relatedList subject="{!Opportunity}" list="Strategic_Account_Plans__r" />
          </apex:tab>
          
          <apex:tab label="STAR Plan" name="STAR_Plan" id="STAR_Plan">               
          <apex:include pageName="Opp_Rel_SAPDetails"/>
          </apex:tab>
          
          <apex:tab label="Services Support Requests" name="Services Support Requests" id="tabSSRs">
             <apex:relatedList subject="{!Opportunity}" list="Request_Services_Support__r" />
          </apex:tab>
          <apex:tab label="Notes and Attachments" name="NotesAndAttachments" id="tabNoteAtt">
             <apex:relatedList subject="{!Opportunity}" list="NotesAndAttachments" />
          </apex:tab>
       </apex:tabPanel>
       
       

       
       
       
       
       
    </apex:page>