Lightroom 3 Eats Memory - Please Help

in lightroom 3, use library mode review , cull wedding images. typically, each folder starts 3,000 images , whittle down around 800 - 1000 images. however, can review 200 images @ time before lightroom eats 99% of memory. happens every 200 or images. when ram utilization gets high hangs whereupon press ctrlq few times , quit. open lightroom again , go through few 100 more images before hangs again. killing productivity!

 

here i've tried far correct (in no particular order).

 

1) started new catalog

2) build 1:1 previews; have tried them @ various sizes , settled on 1:1 previews @ 1440 @ medium quality

3) changed cache drive

4) updated lightroom 3.2

5) defragged hard drives

6) reduced amount of data on drives < 50% of total drive space

7) downloaded , installed os updates.

8) downloaded , installed latest video drivers

9) optimized catalog (many times)

10) close other programs

11) restarted

12) minimize maximize (which recovers ram)

13) turned off nav

14) enlarged cache 30gb , 50gb

15) removed catalog except 3,000 images in 1 folder

16) checked malware

 

this never problem me on lightroom 2.2 ran great on machine. here machine:

 

nvidia nforce 780i sli motherboard  
intel® qx9650 core2t quad extreme
120mm cpu water cooling system                                   
8gb corsair ddr2-800 ram
western digital raptor enterprise 150gb 10k rpm 16mb (os)

western digital raptor enterprise 150gb 10k rpm 16mb (image files)

1tb hitachi deskstar 7k1000 32mb 7200rpm (cache)

nvidia geforce 8800 ultra 756mb pcie (x2)
liquid gpu cooler
1000w silverstone strider power supply                                           
microsoft windows vista ultimate (64-bit)

 

can offer me suggestions? have no other ideas other wipe hds , start fresh install of everything.

there fixes in 3.2 rc, big memory fix didn't go in until after release.

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