When I create a folder on my home screen and add Foursquare to it, after a few uses, the icon changes to the default Android icon (see attached screenshots). The icon remains normal in the Apps screen, but when used in a folder it always changes after a while.
I have noticed the following behaviour on both HTC Desire as well as One XE.
On both devices it only happened after upgrading to OS version 2.3.x.
I guess this is a Foursquare problem rather than an Android problem, but was wondering if anyone has any ideas regarding this?