Is it one point in the timeline or one point in the clip? In other words, if you slid the clip down the timeline one minute, is the dead spot at the same spot in the clip, or at the same spot in the overall timeline?
If it's the timeline, I'd just suggest starting a new timeline, pasting everything over and the problem will most likely go away. If it's the clip, you have bigger problems.
Also, when you're giving information on your system, try not to say "tons of". That tells us nothing. Give us the actual numbers.
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