wubi 10.04 fails using LiveCD burnt with Nero Burning Rom 6.6

[Ray Folwell]

wubi fails with IOError Errno 22 when running from a CD burnt from the iso using Nero Burning ROM 6.6.0.0. The log is attached.
A DVD burnt from the same iso with Nero works correctly. CDs burnt with CDBurnerXP and Nero Express 6.6 also work.

I have extracted the code from \backend\common\utils.py copy_file and created a stand-alone test. This shows the failure happening on the final read when there is less than 1Mb remaining.

This may be a Nero problem rather than wubi but Nero is commonly used burning software and it might be possible to code round the problem?

I am not sure of the intent of the code at line 219 in utils.py
if data_read >= file_size:
            break

but I do not think the condition will ever be satisfied as data_read counts the number of Mb read and file_size is in bytes