I was having an issue with my agenda which appeared empty in the Outlook Web App using Google Chrome. On my phone I was still seeing all appointments and also in Outlook.
Strange this was that it was working correctly up to a few weeks ago. The issue appears to be in Google Chrome since version 38.0.2125.101. It is a known issue filed under 409858 and 421440.
There is also a workaround for it from Charles Wastell. Microsoft has taken action for this on their Office 365 environment as mentioned by Charles Wastell.
However it looks like Google is going to correct it in their Chrome browser and the patch should be come available for the 38 version somewhere this week.
Update: The issue has been solved in Google Chrome version 38.0.2125.111.