Come on guys... can somebody take the time to fix this damn forum software? You can't edit or delete your posts, you can't paste in errors to get help and it gets worse, not better as time passes.

I am trying to upgrade a site from 3.03 to 4.00 RC. I was NOT able to get the installer to work when trying to move from 3.03 to 4.x so hat to use 4.00 RC.

The backend loads but all page nodes create errors:

Server Error in '/' Application. 
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Value cannot be null.
Parameter name: value 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 
Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: value
Source Error: 
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
  
Stack Trace: 
[ArgumentNullException: Value cannot be null.
Parameter name: value]
   System.Web.Caching.CacheEntry..ctor(String key, Object value, CacheDependency dependency, CacheItemRemovedCallback onRemovedHandler, DateTime utcAbsoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, Boolean isPublic) +8840107
   System.Web.Caching.CacheInternal.DoInsert(Boolean isPublic, String key, Object value, CacheDependency dependencies, DateTime utcAbsoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, CacheItemRemovedCallback onRemoveCallback, Boolean replace) +93
   System.Web.Caching.Cache.Add(String key, Object value, CacheDependency dependencies, DateTime absoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, CacheItemRemovedCallback onRemoveCallback) +81
   umbraco.cms.businesslogic.cache.Cache.GetCacheItem(String cacheKey, Object syncLock, CacheItemPriority priority, CacheItemRemovedCallback refreshAction, CacheDependency cacheDependency, TimeSpan timeout, GetCacheItemDelegate`1 getCacheItem) in d:\inetpub\wwwroot\ccnet\Source\Umbraco 3.1\umbraco\cms\businesslogic\cache\Cache.cs:127
   umbraco.cms.businesslogic.cache.Cache.GetCacheItem(String cacheKey, Object syncLock, CacheItemPriority priority, CacheItemRemovedCallback refreshAction, TimeSpan timeout, GetCacheItemDelegate`1 getCacheItem) in d:\inetpub\wwwroot\ccnet\Source\Umbraco 3.1\umbraco\cms\businesslogic\cache\Cache.cs:111
   umbraco.cms.businesslogic.cache.Cache.GetCacheItem(String cacheKey, Object syncLock, CacheItemRemovedCallback refreshAction, TimeSpan timeout, GetCacheItemDelegate`1 getCacheItem) in d:\inetpub\wwwroot\ccnet\Source\Umbraco 3.1\umbraco\cms\businesslogic\cache\Cache.cs:104
   umbraco.cms.businesslogic.cache.Cache.GetCacheItem(String cacheKey, Object syncLock, TimeSpan timeout, GetCacheItemDelegate`1 getCacheItem) in d:\inetpub\wwwroot\ccnet\Source\Umbraco 3.1\umbraco\cms\businesslogic\cache\Cache.cs:97
   umbraco.cms.businesslogic.template.Template.GetTemplate(Int32 id) in d:\inetpub\wwwroot\ccnet\Source\Umbraco 3.1\umbraco\cms\businesslogic\template\Template.cs:608
   umbraco.cms.businesslogic.web.DocumentType.get_allowedTemplates() in d:\inetpub\wwwroot\ccnet\Source\Umbraco 3.1\umbraco\cms\businesslogic\web\DocumentType.cs:190
   umbraco.cms.presentation.editContent.OnInit(EventArgs e) in d:\inetpub\wwwroot\ccnet\Source\Umbraco 3.1\umbraco\presentation\umbraco\editContent.aspx.cs:404
   System.Web.UI.Control.InitRecursive(Control namingContainer) +333
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +378

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Version Information: Microsoft .NET Framework Version:2.0.50727.3615; ASP.NET Version:2.0.50727.3614