Opps... my bad. I must have gotten that idea from having to use partion magic or something... thanks for the correction..
take from the parted website:
detect create resize copy check
ext2 * * *1 *2 *3
ext3 * *1 *2 *3
fat16 * * *4 *5 *
fat32 * * * * *
swap * * * * *
Reiser * *6 *1, 6 *6 *6
1. For ext2, ext3 and reiserfs: the start of the partition must stay fixed.
2. For ext2, ext3: the partition you copy to must be bigger or exactly the same size as the partition you copy from.
3. For ext2 and ext3: the checking is limited to ensuring the resize and copy commands will be ok.
4. For fat: the size of the new partition after resizing or copying is restricted by the cluster size. Parted can shrink the cluster size, so you can always shrink your partition. However, if you can't use FAT32 for some reason, you may not be able to grow your partition.
5. Parted supports both FAT16 and FAT32. Parted can convert file systems between FAT16 and FAT32, if necessary.
6. Reiserfs support is enabled if you install libreiserfs, available at http://reiserfs.osdn.org.ua.
(It is likely to be available soon from http://www.namesys.com