Even though this issue was reported in 10.7, the issue still remains in 10.8.
I have a home network consisting of a iMac (2011) and two Windows 7 PCS connected to a Netgear Gigabit switch. I on occasion transfer files to and from my Mac and my Windows PCs.
Pre OSX Lion, This situation worked fine. But since Lion and now Mountain Lion I am no longer able to copy files to my Mac from my Windows Pcs. Copying files from my Mac to my Windows Pcs work fine. In troubleshooting this issue, I found out in the Network system preference option after selecting ethernet and then the advanced button, then clicking on the Wins tab, that the Netbois and Workgroup fields are blank. After providing a Netbois name and the workgroup name the same as the Windows Pcs, then selecting the OK button generally works. Sometimes I have to go in multiple times before it takes the information but once it does everything works as it suppose until I reboot or shutdown and startup. If I do either when I go back into the Network in the System Preferences the fields are blank again.
I've followed some of the suggestions from the other support documents but they did not work for me:
1. Deleting the com.apple.systemperference.plist file and .lockfile
2. Create a duplicate ethernet service add the necessary changes then make that ethernet service the active one after disabling the original one.
None of these worked. I submitted on Apple Feedback this issue when I was still running OSX 10.7.2 but it never was fixed and now Mountain Lion behaves the same way. I will be submitting once again in hopes someone at Apple pays attention.
It seems this issue has to do with the Apple inhouse developed SMB share implementation. When they was using the SAMBA software I had no issues.
I even did a clean install of Mountain Lion to make sure the problem would not be transferred from Lion. Didn't make a difference.
Any help would be appreciated.