DVC Pro HD corruption

We started working with the Final Cut 6.0.1 last week on a Power PC G5 Dual 2Gb. We receive quicktime files from the lab with the following compression DVC Pro HD 1080 p25 (We have the QT Pro 7.2) Our sequence has the following setting DVC Pro HD-1080 p24. Now the problem we´re having is that once we conform the quicktimes from 25fps to 24fps through Cinema Tools, when we import them to Final Cut the conformed clips show at some points few corrupted frames (the screen gets all colorfull pixelated) . The clips from the lab look fine at 25fps, so we think the problem might be with the Cinema Tools. Why this happens? Or the problem could be when we copy the material to our 4 disk SATA internal raid?
Also we have problems to merge audio and video clips. We mark both the in point at the slate chack, and once we merged them the audio is randomly merged and not precisely at the mark we set. And the difference is not constant, so in one could be 7 frames, and the next more than a second, either after or before the image´s chack. By the moment we´re merging through the timeline, but it takes us more time.
This has happened to us in the past, but just a couple of times, now it seems that it doesn´t work at all, and we don´t know if it has to do with the 6.0.1 version.
Please could someone give us some light into this darkness?

I've noticed this merge problem when adjusting the in audio point at millisecond. Setting the in point on a frame creates a correct merged clip.

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White screen issue with DVC Pro HD

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next day
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we believe that quicktime is somehow changing the codecs DVC PRO and changing it to "Integer (Big Endian), Timecode, Video.." that is what it says.. and comepletely removing the codec for the video, and deleting the video footage, but keeping the audio in place perfectly. now, we also used metadatahootenanny to inspect a copy of the file and low and behold severe corrupt of the meta data in the quicktime file. the issue be with quicktime interaction with storage, or a bug quicktime behalf. we need to find a solution to this issue. we are currently in contact with apple tech support and hopefully we will be posting a answer soon.

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#8 External Monitor Viewing.
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http://forums.adobe.com/thread/880824
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(sorry for my poor english, i'm french...)
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For CS5 and later, the easy way to insure that your video and your project match
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