Disk Utility unable to resize drive

Hi,
I have been trying to resize my boot partition so that it fills the remaing space, however Disk Utility won't sucessfully complete the operation. I have tried the following:
Normal boot - in Disk Utility drag the botton right of the partition to fill remaining space and tap apply. Disk Utility reports that operation has completed, however the partition graphic bounces back to it's previous state.
Boot to Lion Recovery HD - Repeating the above steps, Disk Utility reports an error trying to unmount the drive.
Download Lion Recovery Tool and Boot from USB - Repeating the above steps, Disk Utility reports an error trying to unmount the drive.
I have also tried to use iPartition, but have bot been able to resize the drive. I have a Boot Camp partition which is working fine.
Has anyone had a similiar problem?
Mark

Hi,
No I haven't got a solution for this yet - I'm probably going to have to drop and rebuild the boot camp partition.
Mark

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Disk Utility unable to resize drive

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