Problems bitmap filters FlashBuilder 4.7 / Air3.4

yesterday, purchased , installed flashbuilder 4.7, 64 bit windows version.

with it, built project ios, , installed export release (air3.4 ios) on ipad 1 testing.

two "unforgivable" problems showed up:

1. of artwork looks utterly spoiled, if entirely different filter coefficients
were being applied bitmaps.

(note: builds flashpro 5.5, flashpro 6.0 , flashbuilder 4.6 / air3.1 ios (32 bit) of
the same code show consistent , proper results instead)

2. application runs slower when exported release flashbuilder 4.6.

is there way deal these problems?
(apart applying refund)

thanks in advance

ps: tests on desktop (using air simulator) using fb 4.7 show same filter problem.

.. additional info:

i've tried installing 32 bit windows version of flashbuilder 4.7 (on different system, rule

out incidental system problems) well, problems same version.

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