Matlab R2009a sucks!

I updated to R2009a and it couldn't even load my old v7.3 mat files. I thought the files were corrupted, so I re-generated one of them. But it simply refused to save the file! It was not that huge (~3gb) and should have no problem being stored in the v7.3 format. Then I tried the "hdf5write" functions to store it in the hdf5 format. You know what? Matlab failed again!