When importing sprites from .gif files (and ONLY .gif files), the output seems corrupt and overall just really weird. It appears to happen all the time.
Some examples of corrupted data:



This is a new occurrence with the latest BYOND releases, but I can't exactly say when it began because I don't know. The corrupted pixels also only happen when the background is transparent.
Can you reproduce a method that doesn't have the artifacts, in other words. Are you sure it isn't just the source files?