Sound Sync issues

Hi there. Can anyone help me with this. I've recently captured footage from DVCPRO HD tapes (1080i25p) to the DVCPRO HD format (1080 25i) in FCP through my KONA 3. The footage i have of an interview seems to be out of synch with the sound...not sure by how much, but after doing what i'll explain next, i'm betting it's about 4 frames!
I wasn't too concerned as it's something i've noticed before and thought that i could have made a mistake with the capture (the KONA 3 is new) and i'm fairly happy to re-sync the sound if needs be. The main problem is that i have now opened an old project (DV PAL) that needs a number of sequences printed to DV tape for my client. Upon opening my project it seems that all the sync to the interviews in the project are now 4 frames out!! Very annoying!
I can't find anything that could be wrong here within my settings and can't quite get to grips with it but suffice to say, i could do with a pretty quick solution!
I don't have my RAID turned on with my other project and am just running this from a firewire 800 drive. The project has not been touched since about a week ago when everything was fine!! I've tried deleting all my render files for the project but this hasn't helped either.
If anyone can help with this i'd really appreciate it
thanks
Alex

Thanks Ken, I've managed to resolve the issue to a certain extent now. There did seem to be some sort of lag introduced by the Kona even though i wasn't directing sound through it or even had anything plugged in to the sound out connectors on the breakout box. I disconnected the HDCAM deck i have in the suite from the breakout box and things are now back in sync. A solution, but certainly would be interested to know why as I'd like to think i'd be able to cut stuff even if a deck is connected to my breakout box.

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    Machine name: DEREK
    Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.101209-1647)
    Language: English (Regional Setting: English)
    System Manufacturer: Dell Computer Corporation
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    Processor: Intel(R) Pentium(R) 4 CPU 3.00GHz
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    Windows Dir: C:\WINDOWS
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             DAC type: Integrated RAMDAC
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    Driver Date/Size: 10/22/2010 07:23:24, 6359552 bytes
          WHQL Logo'd: Yes
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             Mini VDD: nv4_mini.sys
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