Premiere Pro CS5 - Slow Clunky UI Problem

Video playback is fine after it's rendered.
But navigating the timeline and UI is extremely slow and clunky.
Anyone have any ideas why this might be?
I have experienced the CS5 bug where the file keeps growing in size over time for no good reason. Maybe this is the same thing. But if anyone knows of any solutions or work-arounds please tell me.

Thanks


System:
Windows 7 Professional 64-bit
Phoenix ROM BIOS PLUS Version 1.10 A13
Intel(R) Xeon(R) CPU W3505 @ 2.53GHz (2 CPUs), ~2.5GHz
12GB RAM
DirectX 11
NVIDIA QUadro NVS 295
and
NVIDIA GeForce GTX 560 Ti

Software and Graphic drivers are up to day.

ShaneNewville.com

There maybe helpful info in this video. Check it out.

http://tv.adobe.com/watch/learn-premiere-pro-cs5/optimize-a-computer-for-me...

Tom Daigon
PrP / After Effects Editor
http://www.hdshotsandcuts.com
Mac Pro 3,1
8 core
10.7.3
Nvidia Quadro 4000
24 gigs ram
Maxx Digital / Areca 8tb. raid
Kona 3

I am surprised that scrolling the timeline alone would be so heavy on processing. I thought video playback would be that biggest CPU hog. And that runs perfectly fine. But when I use middle mouse wheel or click and drag the scroll bar on the timeline it is about a 1-2 second delay. And I see CPU Usage go up to 3% to 40%. And this is without any video playing.

ShaneNewville.com

Did you install latest update CS5.0.3?

-----------------------------------------------
Adobe Certified Expert Premiere Pro
Adobe Community Professional

[WORK-AROUND]
To anyone else who runs into this problem.

The only way I have found to fix Premiere Pro CS5's ultra slowdown issue is as follows:

1. Create a new Project with the same settings as your current project.
2. Copy & Paste all files and clips from the old project into the new project.

This includes all files in the Project window and all clips in the timeline.

Thankfully when you copy (Ctrl + C) it keeps everything in the clipboard even after closing the old project and opening the new.

After I did this the UI was lighting fast again.
This proves updating to the latest version of CS5 does not solve the problem. It's a pain in the butt to have to do go through this process every so many saves, but at least it restores your project into a fresh new file.

Adobe, please fix this bug for CS5 users!

ShaneNewville.com