evolution 2.29.6
libmapi 0.9 

I schedule a meeting and send it, when any recipient accepts the request, i get notification mail about his acceptance but evolution isn't able to render it properly. 

I see an error in message body
"The calendar attachment is not valid"

Message source says

Content-Transfer-Encoding: 8bit
Content-Type: text/calendar; charset="CP1252"

BEGIN:VCALENDAR
CALSCALE:GREGORIAN
PRODID:-//Ximian//NONSGML Evolution Calendar//EN
VERSION:2.0
METHOD:REPLY
END:VCALENDA

Expected : I should be able to see message properly and update the calendar.