[gbowlds]

Hello. I was originally using Calibre on a windows 7 system with over 3000 books in my library (stoered on a separate partition). I recently switched over to Ubuntu Linux 11.04. I installed Calibre, pointed it to my existing library and everything wored just fine. I had some problem with the OS, so I reformatted the main partition and installed Linux Mint 10. When I tried pointing it to my existing library I got the bad database error. I've tried the installation wizard twice and I tried the icon on the main menu. Nothing works. Also I download some news with Calibre but cant read it because it cant find an approriate reader. I hope someone can help because I love this program! Below are the details:

ERROR: Bad database location: Bad database location u'/media/My Stuff/Biblioteca de calibre'. Will start with a new, empty calibre library

Traceback (most recent call last):
File "/usr/lib/calibre/calibre/gui2/main.py", line 205, in initialize_db
db = LibraryDatabase2(self.library_path)
File "/usr/lib/calibre/calibre/library/database2.py", line 144, in __init__
self.initialize_dynamic()
File "/usr/lib/calibre/calibre/library/database2.py", line 210, in initialize_dynamic
CustomColumns.__init__(self)
File "/usr/lib/calibre/calibre/library/custom_columns.py", line 166, in __init__
is_editable=v['editable'])
File "/usr/lib/calibre/calibre/library/field_metadata.py", line 393, in add_custom_field
raise ValueError('Unknown datatype %s for field %s'%(datatype, key))
ValueError: Unknown datatype composite for field #formats