Comment 9 for bug 541840

03-31 02:02 DEBUG TaskList: #### Finished get_metalink
03-31 02:02 DEBUG TaskList: New task get_file_md5
03-31 02:02 DEBUG TaskList: #### Running get_file_md5...
03-31 02:03 DEBUG TaskList: #### Finished get_file_md5
03-31 02:03 ERROR CommonBackend: Invalid md5 for ISO I:\ubuntu-10.04-beta1-desktop-i386.iso (da204743a8aef0ef759250154aa8ed0d != 6fb01508ba8ea50886cfbbce917bd700)
None
03-31 02:03 DEBUG TaskList: ### Finished check_iso
03-31 02:03 ERROR TaskList: coercing to Unicode: need string or buffer, NoneType found
Traceback (most recent call last):
  File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__
  File "\lib\wubi\backends\common\backend.py", line 492, in get_iso
  File "\lib\wubi\backends\common\backend.py", line 440, in use_cd
  File "\lib\ntpath.py", line 269, in isdir
TypeError: coercing to Unicode: need string or buffer, NoneType found
03-31 02:03 DEBUG TaskList: # Cancelling tasklist
03-31 02:03 DEBUG TaskList: # Finished tasklist
03-31 02:03 ERROR root: coercing to Unicode: need string or buffer, NoneType found
Traceback (most recent call last):
  File "\lib\wubi\application.py", line 56, in run
  File "\lib\wubi\application.py", line 126, in select_task
  File "\lib\wubi\application.py", line 194, in run_cd_menu
  File "\lib\wubi\application.py", line 118, in select_task
  File "\lib\wubi\application.py", line 156, in run_installer
  File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__
  File "\lib\wubi\backends\common\backend.py", line 492, in get_iso
  File "\lib\wubi\backends\common\backend.py", line 440, in use_cd
  File "\lib\ntpath.py", line 269, in isdir
TypeError: coercing to Unicode: need string or buffer, NoneType found

not sure whats up with this but here thats the error i keep getting