Icon not showing up (and also some of my images periodically)

Hello All;
I'm having two graphical issues with my App:
1) The Icon does not show up despite being referenced correctly and showing up fine in the simulator. Does it have to be a png of exactly the dimensions 57 x 57?
2) I have a bunch of different background images that get loaded into a view periodically during my app...and it seems some of them are not showing up sometimes, but only sometimes. These file are not small filesize wise so is that the problem? If I trim down the file sizes will that rectify the situation? On that point are there any guidelines regarding this sort of thing?
Thank you in advance.

I am seeing the exact same thing. The Icon.png image appears white on the device and the images that the app loads are black. I run the sample apps on the device and the same thing happens. Running the code in the simulator works like a charm. So I dont think its code related. I think its an SDK/driver/OS configuration issue.

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