Here's what I got (if it seems wrong it cd be that this is for my 2GB card):

~ $ sudo gainroot
Root shell enabled


BusyBox v1.6.1 (2007-09-27 18:08:59 EEST) Built-in shell (ash)
Enter 'help' for a list of built-in commands.

/home/user # /sbin/sfdisk --no-reread /dev/mmcblk0

Disk /dev/mmcblk0: 246224 cylinders, 4 heads, 16 sectors/track
Old situation:
Warning: The partition table looks like it was made
for C/H/S=*/233/20 (instead of 246224/4/16).
For this listing I'll assume that geometry.
Units = cylinders of 2385920 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/mmcblk0p1 1+ 3381- 3380- 7875072 b W95 FAT32
start: (c,h,s) expected (1,176,13) found (0,130,3)
end: (c,h,s) expected (1023,232,20) found (980,232,20)
/dev/mmcblk0p2 0 - 0 0 0 Empty
/dev/mmcblk0p3 0 - 0 0 0 Empty
/dev/mmcblk0p4 0 - 0 0 0 Empty
Input in the following format; absent fields get a default value.
<start> <size> <type [E,S,L,X,hex]> <bootable [-,*]> <c,h,s> <c,h,s>
Usually you only need to specify <start> and <size> (and perhaps <type>).

/dev/mmcblk0p1 :