Exploit allows iOS apps to use animated icons →
source: bryce.coBryce Bostwick:
iOS includes a feature called Alternate App Icons that allows apps to provide a set of multiple icon choices that the user can choose from. Apple includes a protection mechanism that prevents apps from changing their icons without user intervention, but Bryce discovered a way for this check to be bypassed. This allows apps to change their icons as frequently as they’d like — including fast enough to create the appearance of an animated icon.
I have a feeling this will be patched in short order.