Calendar shows no events in Internet Explorer 8/9, maybe other versions

[GoogleCodeExporter]

What steps will reproduce the problem?
1. View http://www.countryshowguide.co.uk/ in Firefox or Chrome - see it 
working on right hand side.
2. View http://www.countryshowguide.co.uk/ in Internet Explorer
3. Verify JSON data is visible - 
http://www.countryshowguide.co.uk/plugin/calendar/event/widget/65536?limit=4&yea
r=&month=false&day=

What is the expected output? What do you see instead?
In Internet Explorer you should see the events populated below the calendar 
(like in FF/Chrome/etc) but instead you see the message "There are no events in 
this period"

What version of the product are you using? On what operating system?
Latest version 0.54, Windows 7 with Internet Explorer 8 & 9

Please provide any additional information below.
I verified that the JSON is valid using 
http://jsonformatter.curiousconcept.com/ so there should be no reason for this 
inconsistency, it must be an IE only issue

Original issue reported on code.google.com by nigel...@gmail.com on 7 Aug 2013 at 2:35

Attachments:

• calendar-example.jpg

[GoogleCodeExporter]

After some more investigation it appears that IE does not like the 
application/json MIME type, so returning the JSON using text/plain MIME type 
fixes this.

Original comment by nigel...@gmail.com on 8 Aug 2013 at 11:14