SanDisk losing memory space??

[SayCheeses]

Hello All,
I noticed today when putting my 1gb San Disk memory card back into my Nikon D50 instead of 951 pictures avail.....it went to 501. I did not change anything - all settings stayed the same as when I saw the 951 available pictures.....any ideas?
Thanks for your help!

 

[Sw1tchFX]

format the card and see what happens, if that doesn't fix anything, than reset the camera.

 

[Boltthrower]

format the card and see what happens, if that doesn't fix anything, than reset the camera.

I had the same thing happen I had used a CF to move some stuff from my tower to my brothers and forgot to format the card after i was done. needless to say the card that once read 100+ shots now read 30 shots I forgot to format the card after i was done. I formatted it in the computer then in the camera and all was well

 

[Olympus8MP]

Try emptying your recycle bin when the card is in the computer. I've seen weird things happen there before.