Screen flicker Mac Mini i5 2.3GHz 2011 ?

Hi people,
Does anybody else also experiences screen flicker on the Mac Mini i5 2.3GHz 2011 model, during startup from sleep-mode or a cold-boot in the morning?
I posted a video on YouTube, to visualize the problem (otherwise hard to imagine, perhaps):
http://www.youtube.com/watch?v=5sbAhjlfN_M
Room temperature is about 15 degrees Celsius (Europe, wintertime) and the problem exposes itself when the machine is powered up after a nights sleep, or during a cold boot in the morning, the screen flashes from like the same in the YT movie, but then with the grey background and Apple-logo on it, continuing until the working desktop appears and then flashes some few more times, until "warmed-up".
When the Mac has woke up during the day, room temperature about 23-25 degrees Celsius, the screen doesn't flicker at all, or at max. 1-2 times.
The main screen (on the YT movie) is connected through Thunderbolt with an original Apple-brand mini-DisplayPort to DVI convertor and the secondary screen through a (with the Mac Mini facilitated) HDMI -> DVI convertor.
The second screen always lags a little behind the main screen and the desktop appears when the main screen desktop has fully appeared, so no flickering on the second screen noticed, till so far.
Setup:
-Mac Mini i5 2.3GHz, model 2011 with a Kingston V+100 96GB SSD and 8GB Corsair RAM 1333MHz;
-Main screen: Thunderbolt -> DVI, Dell 2005 FPW 20" IPS-panel @1680x1050;
-Secondary screen: HDMI -> DVI, Dell 1704FPT 17" TN-panel @1280x1024.
A SMC-reset and PRAM-reset didn't help, contacted Apple-support which recommended to download the generic Thunderbolt-patch DL1451, which I later recognized in my Software-update list in MacOS, as already download in October 2011, named/tagged: Thunderbolt 1.1
The Mac is already running the latest firmware, EFI 1.4 (the machine is brand new, so expected no less then the latest to be honest.)
Next step I'm going to try is: switch the screens on HDMI <-> Thunderbolt (didn't try that yet.)
Never experienced this with my Mac Mini's 2009 before (had two of them, first the 2.0GHz and later the 2.26GHz- big Mac Mini fan overhere!), running the same setup (but then on Mini-DVI & Mini-DisplayPort.)
It really feels like the internals of the Mac Mini 2011 have to warm-up, before fully functional...the Apple specs give me an operating temperature of 10-35 degrees, I'm not living in a cave, neither I accidentally forgot to turn off the air-conditioning system after the summer ended, so what the hack?
Reminds at my childhood, the time we still used B/W television @my parents home with kathode/anode-tubes in it, they also needed some time to "warm-up" before presenting a stabile image ;-)

Did you find a solution? I have the same hardware and same problem. I dont connect via thunderbolt, just the DVI-cable supplied by Apple to my TFT monitor. But without any hardware changes or updates it started a few days ago.

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