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# New in matplotlib 1.2.2

Table of Contents

- New in matplotlib 1.2.2
  - Improved collections
  - Multiple images on same axes are correctly transparent

## Improved collections

The individual items of a collection may now have different alpha values and be rendered correctly. This also fixes a bug where collections were always filled in the PDF backend.

## Multiple images on same axes are correctly transparent

When putting multiple images onto the same axes, the background color of the axes will now show through correctly.