API v1 query stopped working with no code changes

We have been using the API v1 for quiet some time in our application which has 
been working fine but recently the API stopped returning query results.

Code to reproduce the issue

Private Shared GoogleService As CalendarService
Private Shared feedUri As String = 
"https://www.google.com/calendar/feeds/default/private/full"

Dim myQuery As New EventQuery(feedUri)
myQuery.Query = "Tennis"

Dim myResultsFeed As EventFeed = TryCast(GoogleService.Query(myQuery), 
EventFeed)

If we then check the event count on myresultsfeed it always returns zero.

I have tried writing test applications using other peoples code from the web 
and these are also returning no results. The only thing that has changed is 
that we are now using Visual Studio 2013 but from what I know there wasn't any 
issue with this until recently.

Version number of the gdata components is 2.1.0.0

We will be upgrading to the v3 API once some good documentation appears but if 
there is anything you can do to help in the meantime it would be appreciated.

Thank you 
Simon

Original issue reported on code.google.com by simon.ri...@oaktechnology.co.uk on 16 Mar 2014 at 7:19

ianC92 / google-gdata

API v1 query stopped working with no code changes #685