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Greg the Corsair Value Select from the Egg is also available from Amazon. Amazon.com : Corsair 1GB (1x1GB) DDR 333 MHz (PC 2700) Laptop Memory (VS1GSDS333) : Laptop Computer Internal Memory : Electronics
If it doesn't work, claim it's defective they will take it back and pay shipping.
I've never come across the density issue either. It may be something your model has an issue with.