Whenever I export a vector to an image, and the image is not a multiple of the original vector canvas size, it is pixelated and over-anti-aliased in certain areas of the image.
An example: I started out drawing the Brackets icon as a vector on a 30x30 px canvas, and exported to 128px. You will notice that the 120px version is much sharper than the 128px version, because 120px is a multiple of 30 (the start dimension).
Why does this happen, and how can I avoid it?