I always use the 3.5 compilers - so that is not the issue.

Any luck from your logs?  Either the script logs or the EventLog in the db.

I am receiving the same issue have have restored an attempted to upgrade several times and the results remain the same.

QueryString displays:  "error=Object+reference+not+set+to+an+instance+of+an+object.&content=0"

Event Log displays:  "217fff03-5e8a-4805-aa89-1601518e732e PAGE_LOAD_EXCEPTION

6 NULL NULL 0 NULL 2009-02-26 15:46:18.313 DT-

SQLAPP1 <LogProperties><LogProperty><PropertyName>AssemblyVersion</PropertyName><

PropertyValue>5.0.1</PropertyValue></LogProperty><LogProperty><PropertyName>

PortalID</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty>

<PropertyName>PortalName</PropertyName><PropertyValue>Derek

Trauger</PropertyValue></LogProperty><LogProperty><PropertyName>UserID</PropertyName><PropertyValue>-

1</PropertyValue></LogProperty><LogProperty><PropertyName>UserName</PropertyName>

<PropertyValue /></LogProperty><LogProperty>

<PropertyName>ActiveTabID</PropertyName><PropertyValue>38</PropertyValue>

</LogProperty><LogProperty><

PropertyName>ActiveTabName</PropertyName><PropertyValue>Home</PropertyValue>

</LogProperty><LogProperty><PropertyName>RawURL</PropertyName><PropertyValue>/Default.aspx?

tabid=38&amp;error=Object+reference+not+set+to+an+instance+of+an+object.&amp;

content=0</PropertyValue>

</LogProperty><LogProperty><PropertyName>AbsoluteURL</PropertyName>

<PropertyValue>/Default.aspx</PropertyValue><

/LogProperty><LogProperty><PropertyName>AbsoluteURLReferrer</PropertyName

><PropertyValue>http://www.derektrauger.com/Default.aspx?

tabid=38&amp;error=Object+reference+not+set+to+an+instance+of+an+object.&amp;c

ontent=0<

/PropertyValue></LogProperty><LogProperty><PropertyName>UserAgent</Property

Name><PropertyValue>Mozilla/5.0

(Windows; U; Windows NT 5.2; en-US) AppleWebKit/525.19 (KHTML, like Gecko) Version/3.1.2

Safari/525.21</PropertyValue></LogProperty><LogProperty><PropertyName>DefaultDataProvider

</PropertyName><PropertyValue>DotNetNuke.Data.SqlDataProvider,

DotNetNuke.SqlDataProvider</PropertyValue></LogProperty><LogProperty><PropertyName

>ExceptionGUID</PropertyName><PropertyValue>488b97ef-f803-44d1-a375-

8aa4faba0794</PropertyValue></LogProperty><LogProperty><PropertyName>InnerException

</PropertyName><PropertyValue>Object reference not set to an instance of an

object.</PropertyValue></LogProperty><LogProperty><PropertyName>FileName</PropertyName>

<PropertyValue /></LogProperty><LogProperty><PropertyName>FileLineNumber

</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>

FileColumnNumber</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty>

<PropertyName>Method</PropertyName><PropertyValue>DotNetNuke.UI.Utilities.MSAJAX.get_IsInstalled

</PropertyValue></LogProperty><LogProperty><PropertyName>StackTrace</PropertyNam

e><PropertyValue /></LogProperty><LogProperty>

<PropertyName>Message</PropertyName><PropertyValue>DotNetNuke.Services.Exceptions.PageLoadEx

ception: Object reference not set to an instance of an object. ---&gt; System.NullReferenceE

xception: Object reference not set to an instance of an object.     at

DotNetNuke.UI.Utilities.MSAJAX.get_IsInstalled()     at DotNetNuke.UI.Utilities.MSAJAX.Regis

terStartupScript(Page objPage, String Key, String Script)     at

DotNetNuke.UI.Utilities.ClientAPI.RegisterStartUpScript(Page objPage, String key, String scri

pt)     at DotNetNuke.Framework.DefaultPage.InitializePage()     at

DotNetNuke.Framework.DefaultPage.Page_Init(Object sender, EventArgs e)     at System.We

b.UI.Control.OnInit(EventArgs e)     at System.Web.UI.Page.OnInit

(EventArgs e)     at DotNetNuke.Framework.PageBase.OnInit(EventArgs e)     at System.Web.

UI.Control.InitRecursive(Control namingContainer)     at

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Bo

olean includeStagesAfterAsyncPoint)     --- End of inner exception stack

trace ---</PropertyValue></LogProperty><LogProperty><PropertyName>Source</Property

Name><PropertyValue /></LogProperty></LogProperties> NULL"

Any help is appreciated.

Thanks.

Derek
 

Not sure if this will solve everyone's problems but the upgrade package included the System.Web.Extensions.dll in the bin directory, for my particular case removing this dll corrects my problem.  I initially thought the dll was not registered in my web.config but upon review it was.  Not sure why this corrected my problem or why this dll was included in the upgrade as it was not in my bin directory prior to upgrade.  I assume that my installation is getting this library from the GAC?  Hopefully this helps someone.  If anyone has more information about why this might have corrected my problem i'd be interested in a better understanding.

Thanks.

Derek