Migrating an app from D7 to DX10.

Migrating an app from D7 to DX10.2, we've got a bunch of instances where the app is loading up GIF images to buttons and panels and whatnot in the main form's OnCreate method, and they're all throwing an exception "Invalid GIF signature". From what I can tell this is coming from a standard VCL library, VCL.Images. Has anybody ever run into this and willing to share how they resolved it?