It's not just two visa denials. I'm pretty sure about at least five cases including mine.
It was predictable for me so I talked to one of my friends two months ago to take over my presentation in case of visa denial. For the next events I suggest you to be prepared for issues like this.
Best
On 8/6/14, Pine W wiki.pine@gmail.com wrote:
Hi,
This is the second report I have heard about last minute visa surprises. This kind of problem is disruptive not just for those who were denied entry but for others who were planning on the attendance of the person whose visa was denied.
In any case, can you give your presentation remotely?
Pine