I have found the paypal IPN failing because of Active Directory. Since I don't use it, I have just unistalled it.

Hello Gilles,

Both DontetNuke and the store modules were upgrages. It is too late to double check, but I am almost sure it was installed and activated by mistake. Paypal was receiving a 500 http error on the ipn because of that.

I don't know if it helps you, but here is the other stuff I had in the event logs that gave me the idea of uninstalling active directory:

AssemblyVersion: 5.6.2
PortalID: 4
PortalName: Permalook
UserID: -1
UserName:
ActiveTabID: 156
ActiveTabName: Accueil
RawURL: /Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer:
UserAgent:
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: ae608c2c-cb63-4cb8-ba25-66b47b7b24e4
InnerException: Unhandled Error:
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Authentication.ActiveDirectory.HttpModules.AuthenticationModule.OnAuthenticateRequest
StackTrace:
Message: System.Exception: Unhandled Error: ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Authentication.ActiveDirectory.HttpModules.AuthenticationModule.OnAuthenticateRequest(Object s, EventArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) --- End of inner exception stack trace ---
Source:
Nom du serveur: DVDESIGNMEDIA

Thanks for checking on that issue, it feels good see some great developement on the store module. By the way do you know of anyone working on other tax and shipping providers? That's all that is missing to this module to make it perfect for small budget online stores.