When using inline resize with a percentage scale on built-in patterns and images the scaling is done twice.
examples:
'pattern:bricks' is 16x16
'pattern:bricks[200%]' is 64x64 when it should be 32x32
-size 256x256 'pattern:bricks[200%]' is 512x512 tiled 8x8 when it should be 256x256 tiles 8x8
The last example seems to show the two separate points where the scaling is applied when it should be only the first one.
Alan.