using vista 32 and a 2gb Sandisk, everytime I return from hibernate mode the readyboost cache disappears. The cache file disappears, but the space it was taking up is still being taken up, and at this point if I right click the flash drive and go to the readyboost tab it will tell me that I need to free up more space if I want to use readyboost. Since there's no file to delete, I have no choice but to reformat the card, but that's useless anyway since it will just happen again next time I close the laptop's lid. Googling for "readyboost cache disappears" shows I'm not the only one with this problem, but after searching for more than 20 minutes I did not spot a solution