[ubuntu-in] USB Mass Storage unmount bug

[Ravi Shanker]

Hi friends,
Here is a bug description: 
I attached a USB Mass storage (1GB) Drive, started some Data transfer
from HDD to USB Pen Drive, while copy progress was going on, I also
attached another Pen Drive (2GB), and started another data transfer from
HDD to 2GB pendrive. While the 1 GB pendrive data transfer was complete,
I did click "Eject" in Nautilus computer:/// place, and wow, the system
hanged. Nautilus crashed, CPU process to 100 % on Core2 Duo HP Computer.
I did wait for 15 mins, nothing happened. 

OS:
Ubuntu Feisty 7.04 (updated to latest)

System Specs:
HP Desktop
1GB RAM (DDR2)
250 GB Sata HDD
Intel Core 2 Duo (1.8 GHz x 2)

I could not figure out the problem.
So, please, if you have 2 pen-drives, try to reproduce the bug. If
successful, let me know. In that case I will, or anyone will file a bug.