AGS 10.1 bug results in every-other-call failure

[abenrob]

Reference bug
Forum discussion

Workarounds include appending a random number to the request url (&tr=<#random#>)
I added "&ts=" + (new Date()).getTime() + to the url builder in AGS.js and rebuilt, which is working for my specific project.

ESRI claims bug fixed in 10.2, but folks may still see this if using 10.1.
I can submit a pull req if you'd like, but you may want to explore the issue more before you decide which path to take.
Cheers.