How can I diagnose the following General Exception in the DNN error log.
The error is raised about every 10 seconds, but I have nothing else to go by to figure it out.

AssemblyVersion: -1
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL:
AbsoluteURL:
AbsoluteURLReferrer:
UserAgent:
DefaultDataProvider:
ExceptionGUID:
InnerException: Unhandled Error:
FileName:
FileLineNumber: -1
FileColumnNumber: -1
Method:
StackTrace:
Message: System.Exception: Unhandled Error:
Source:

How would I go about trying to capture it?

I open the site in Visual Studio and run in it debug mode, but as I browse the site, it doesn't trigger anything. Although, they still show up in the logs....
Is there anything else I could try to capture it?