Many users are reporting getting various classification errors

[DarrenMcRoy]

http://talk.chicagowildlifewatch.org/#/boards/BCH0000002/discussions/DCH00003bw?page=1&comment_id=55dd12731766273b88000946

Errors reported include:

• Getting a "no more pics to classify" message that goes away when you reload the site (so obviously it's not true)
• Getting a text box that says "Click this box to prevent this dialog"
• Having the interface break after completing a classification: "the pic disappears as per normal, but the list of animals stays in the frame, along with a circular expanding pattern."

Reported by multiple people (including scientist Mason) and apparently happening more and more often lately. I worry about this turning people off of the project. Do we have any idea what's causing this?

[yshish]

And getting repeated images to classify: http://talk.chicagowildlifewatch.org/#/boards/BCH0000002/discussions/DCH0000439?page=1&comment_id=563e743b1cd22845a800656f