Lightroom 3 Large previews are soft...

Last Year I posted on this forum how on my Mac with Lightroom 3 I was getting soft previews of photo's, well here we are a year later and I still cant use lightroom in my workflow because of this soft preview issue, It's pissing me off to no end.
When viewing my 5D mkII raw files...and other camera model raw files, in the Library & Develop modules, the large preview image in both modules gives a slightly blurry rendering of the photo, if I zoom to 100% I can see the file's actuall sharpness, but I need to be able to run through thousands of files from a shoot and quickly pick out the sharp images from the misfocused one's, which is impossible with this issue.
So now a year later I'm inquiring again to you on this forum and Adobe technicians to help me resolve this issue once and for all.
P.S. For the record, this issue has been here from the day I installed LR3.
My hardware: 2009 Mac Pro with 12GB of Ram, Eizo CE240W 24" Display at 1920X1200.
From what I gather this is a known issue, but reading the below link/posts, I've not found a solution… http://forums.adobe.com/message/3009930#3009930
Thanks, looking forward to your thoughts.

Hi, I have exactly the same issue in LR3, this was not happening in previous version of LR.
When I import picture into LR, I also build "standart previews", which leads to slight soft preview when reviewing picture in the library module (going to the develop module does not help here). Zooming to 100%, waiting for the full rendering then zooming back solve the issue for the current photo. This seems to happen on random pictures since even if I worked on the picture, viewed it at 100% in a previous Lightroom session, it just render it blurry.
Here is a sample showing the issue, the first link show a screenshot just before I zoom at 100%, the second link, just after:
Screen shot before zoom
Screen shot after zoom
It also happen with more modest picture size on the screen (when all panels are shown).
So, it seems like there is a bug somewhere in LR preview rendering.
Cheers,
Philippe.
Edit: open links in new browser tab or windows: the image viewer of the Adobe forums show only a reduced version of the screenshots behind the previous links.

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Message was edited by: Adrian Wackernah
Message was edited by: Adrian Wackernah

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=================================================================
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Hello!
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