Thanks to everyone for their suggestions.
I didn't use DO FDISK for partitioning since it suggests nice things
like "There is 8 GB of free space left on drive, would you like to
create a 22 GB partition?". I found some information about FDISK not
liking to create partitions after a >8GB non-dos partition.
I deleted my entire extended partition, got a freeware dos partitioning
program (Partition Manager), and created a type 'f' extended (Windows
LBA extended) partition. Now I can happily mount this partition in both
Linux and Windows, write large files (2GB) to it, read the in the other
end and not I'm experiencing corruption. So I guess the problem is
solved. I'm using a swapfile now, but I'm going to create a linux swap
partition *after* the windows partition. So here is the working version:
Device Boot Start End Blocks Id System
/dev/hda1 * 1 523 4200966 c Win95 FAT32 (LBA)
/dev/hda2 524 525 16065 83 Linux
/dev/hda3 526 2647 17044965 83 Linux
/dev/hda4 2648 3736 8747392+ f Win95 Ext'd (LBA)
/dev/hda5 2648 3736 8747361 c Win95 FAT32 (LBA)
Thanks again,
Robert