Color Cast in "Grid" Thumbnails

I have a strange color cast (pink) that only shows up in the "Grid" and only on the thumbnails of the original RAW file. This color cast shows up in the over-exposed highlights of my thumbnails and is "NOT" because the "Highlight Hot Areas" is turned on, although if I do turn "Highlight Hot Areas" on, the "warning area" is exactly the same area that is displayed in my thumbnails as the strange pink color cast. "On Screen Proofing" is "NOT" on. This has only happened since updating to Aperture 1.5
I don't shoot anything but RAW so I'm not sure if this happens with any other format that my camera can produce. If I select the thumbnail of the RAW file it displays normally in the "Viewer". If I make a new version or duplicate from the RAW file, the new thumbnails still display the color cast, but once I make an adjustment to the file, the new version thumbnail displays normally.
Here is a link to a JPEG of a screen capture that displays what I'm seeing. - http://www.robertolding.com/picture_2.jpg
These shots are taken with an Olympus EVOLT E-500
PowerMac G5 Quad 2.5Ghz Mac OS X (10.4.8) 4.5GB RAM, Nvidia 7800 GT, 600GB RAID

hello, robert
this almost looks like the View/Highlight Hot Areas
(shift option h) is turned on.
it certainly is in the right spot where the image is
too hot.
does it show up in Full Screen also?
Maybe, delete and update preview?
victor
Hi Victor,
Thanks for your reply.
Yes, as I stated in my original post, it does appear that the View/Highlight Hot Areas is turned on, but it is not.
The images showing in the Viewer display normally and the images in the Grid display the color cast. The only time that the images display normally in the Grid is after I've made an adjustment to them.
Viewing a image in Full Screen does not change anything that I've described.
Interestingly enough, files that were imported into Aperture before the 1.5 upgrade display normally.

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