I upgraded to 4.4.0 and now my custom modules are returning an error when not logged in as host.   The error reads:

Module Load Warning
One or more of the modules on this page did not load. This may be temporary. Please refresh the page (click F5 in most browsers). If the problem persists, please let the Site Administrator know.

I checked the error log and see this:

RawURL: /Default.aspx?tabid=55
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 8ba89a19-6cd8-4639-8a43-9f0f4b9524a7
InnerException: Unhandled Error Adding Module to LeftPane
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Security.PortalSecurity.HasNecessaryPermission
StackTrace:
Message: DotNetNuke.Services.Exceptions.ModuleLoadException: Unhandled Error Adding Module to LeftPane ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Security.PortalSecurity.HasNecessaryPermission(SecurityAccessLevel AccessLevel, PortalSettings PortalSettings, ModuleInfo ModuleConfiguration, String UserName) at DotNetNuke.Entities.Modules.PortalModuleBase.CanAddAction(SecurityAccessLevel access, Boolean checkAdminControl) at DotNetNuke.Entities.Modules.PortalModuleBase.LoadActions() at DotNetNuke.Entities.Modules.PortalModuleBase.get_Actions() at DotNetNuke.UI.Skins.Skin.ProcessActionControls(PortalModuleBase objPortalModuleBase, Control objContainer) at DotNetNuke.UI.Skins.Skin.InjectModule(Control objPane, ModuleInfo objModule, PortalSettings PortalSettings) --- End of inner exception stack trace ---
Source:

Any ideas?

I tried reinstalling them to no avail.

This was an upgrade from 04.03.05.  I have other people reporting the same issues.

see this post

http://www.dotnetnuke.com/Community/ForumsDotNetNuke/tabid/795/forumid/118/threadid/94266/scope/posts/Default.aspx