I have a problem accessing a samba share from a windows 2008 R2. All the shares on the samba server are perfectly ok excepted one. Accessing the same faulty share from a 2008 32 bits or any other xp or 2003 works smoothly... Any clue?
It's because 2008 R2 (or Windows 7) is requiring NTLM v2, which your Samba doesn't do. To make NTLM v2 optional use the following regedit:
Possibly upgrading to Samba 3.43 will fix this without the regedit.