Lines and title flashing across the program monitor and in final export

Question

I'm seeing very thin lines flashing across the program monitor when playing a complex sequence with 7 video tracks. They draw at various angles and span the entire screen. There can be one or more showing at any time. They are colored and each line appears to be only one color, but different lines can be different colors. Some lines are solid, others are dashed. There is also a ghosty-white representation of one of my titles flashing around the screen for only a frame or two, then it flashes somewhere else.
Sequences and Tracks:
Base Sequence: AVCHD with disolves and color correction
Next Sequence Layer: Base Sequence placed on tracks 1 and 2. Motion is applied to both tracks. LInearWipe and Opacity are applied to Track 2.
(This creates an image in the center of the screen with a reflection.)
Next Sequence Layer (1st track of the final 7): Animates Basic3D and Motion (position, scaling)
2nd, 3rd and 4th of the seven are just like the1st. So there are 4 video screens flying around with reflections and perspective. Kind of like the iTunes album art widget - screen flies in, goes center stage, then flies back.
Layers 5 to 7 are titles. They are also nested sequences having reflections and Basic3D, but their positions are not animated.
My system:
Phenom II x6 1055T
8 Gb DDR3 1333
3 Drives 7200 rpm (one program, one preview/conforming, one video)
nVidia GeForce GTX 260 (3 fans attached)
3 Case fans plus the side is open - running very cool
MSI 890GXM-G65 Mobo
My Project:
Originated as a CS4 project, opened with CS5 and converted (did not import). Fixed all the title screwups, missing fonts, graphics, hooked up the off-line media etc etc. There are a couple of 1.5 hour nested AVCHD multi-camera sequences which look and play great. Then there are 2 of these monster sequences which are actually used as DVD menus and are about 44 seconds each. When I render these 7 layer menu sequences and play them back, these lines start flashing across the screen.
Of course the GTX 260 has the GPU unlocked and that works great for the 1.5 hour programs. But if I attempt to render the 44 second monsters Premier stops responding and I have to EndTask it (all CPUs drop to idle while not responding). These monster sequences might test the power of the Quadro CX. So when I work with the menu sequences, I set Premiere to use software GPU and not MPE. Then I can render (2 hours render time to preview 44 seconds with six cores at near 100%). So it does render, slowly.
I'm exporting an mpeg2 file now and will let you know if the lines show up in the final rendering. I can see the lines showing up on the MediaEncoder's small preview screen as it renders. Doesn't give me comfort.
OK worst case scenario. The lines ARE in the final mpeg2 file. Makes the file unusable garbage...
Is anyone else seeing flashing lines and titles?
Here's a link to a still from the export to illustrate the artifacts.(face and name were blanked out by me)
http://img23.imageshack.us/img23/5051/premierecs5lineandtitle.jpg
Thanks

Answer 1

The crop workaround was successful for removing the lines - worked great. There was the issue of the ghost text which you can see in the screenshot link provided above. This was not removed by crop. Crop removed the lines, but not the ghost. Thankfully, the 4 point garbage mask did work on the ghost and I was able to eliminate it. I had to apply the garbage mask on the sequence where Basic3D was applied not its parent sequence where VerticalFlip was used. The most important thing is that I've successfully migrated this CS4 project to CS5 and can now take advantage of 64bit processing (more RAM) to tame the beast. I'm using this sequence as a menu for a series of DVDs so my time expended will pay me back again and again.
The asset generating the ghost was built like this...
In the titler: Text was placed over a logo (.tiff file for logo and it was scaled and moved)
Base Sequence: Title was brought to two, stacked tracks. VerticalFlip, and LinearWipe were applied to one which was then moved to look like a reflection of the other
Next Sequence: Layed the Base Sequence down. Applied Basic 3D and moved it's XY position. (This is where I applied the GarbageMask to remove the ghost)
I tried separating the logo from the text thinking that the logo feature of the titler might be the problem. So I used a separate video track and pulled in the .tiff file directly. It didn't eliminate the ghost. Applying the GarbageMask to the base sequence also didn't help. It was only after Basic3D was applied that the ghost would appear. And since I have Basic3D applied to other reflected text-only layers which do not exhibit the ghost artifact, the bug has something to do with the text/graphic combination with VerticalFlip and Basic3D.
To top it all off, I can no longer recreate the problem. I've turned off the garbage mask and it's not showing up. While I was testing, the ghost was easy to recreate, but now I can't do it. So I don't appear to be able to drill down deeper. Perhaps it will come back at some point and I can test it further and update this thread.