Flickering in Canvas

Just hooked my Mac Pro to a new 30" Samsung 305T monitor. Final Cut Pro displays fine, with one problem: images in the Canvas flicker while playing a sequence. The Viewer is OK: clips play perfectly. But the Canvas seems to vascillate erratically between different frames. (The timeline plays properly on the external NTSC monitor.)
Any suggestions?
Thanks.

Re-booting the system seems to have fixed the problem. Go figure.

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Hi George,
I have taken a look at the files full_treasure_chest.fla and flippable_land.fla that you have shared via drop box and found that they both uses blank keyframe(s) followed by Keyframe(s). This was an issue and has been addressed in the latest release Flash CC 2014 (released on 18 June, 2014). Can you please install the latest build 14.0.0.110 and try this out?
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