Nokia has released an update (version 2175.1003) for the AT&T Lumia 900 that addresses some minor software problems in response to customer feedback. The most notable fix addresses the purple tint of the OLED display in dim lighting, and also patches some sensitivity problems with the proximity sensor. The update — which also includes some "other minor adjustments and enhancements" — can be installed by connecting your Lumia 900 to the Zune desktop software and accepting the update prompt.