Tried that image
Guess it was processed with something like pngout
Any ideas about some support for these tricky inflate variations?
Q:@Y>precomp.exe -v bluevi6.png
Precomp v0.3.7 - ALPHA version - USE FOR TESTING ONLY
Free for non-commercial use - Copyright 2006,2007 by Christian Schneider
Input file: bluevi6.png
Output file: bluevi6.pcf
Possible zLib-Stream in PNG found at position 37, windowbits = 15
Can be decompressed to 455287 bytes
New size: 209432 instead of 209409
Time: 297 ms
Decompressable streams: 1
Recompressed streams: 0
None of the given compression and memory levels could be used.
There will be no gain compressing the output file.