APNG support for GIMP / Bugs

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# Sort A -> Z Sort Z -> A	Summary▾ Sort A -> Z Sort Z -> A	Milestone▾ Sort A -> Z Sort Z -> A Filter by Milestone	Status▾ Sort A -> Z Sort Z -> A Filter by Status	Created▾ Sort A -> Z Sort Z -> A	Updated▾ Sort A -> Z Sort Z -> A
3	Indexed saving support is broken	None	open	2010-10-10	2010-10-10
2	Interlaced PNG files are loaded incorrectly	None	open	2010-08-23	2010-08-23
1	Alpha channel are saved incorrectly	None	open	2010-07-04	2010-07-04