I have found a problem on my home wireless network. Sometimes
I could connect my Linux machines to the network Windows PC's
for sharing and sometimes I had "issues". I brought up the Samba
configuration file, and added the name of my personal group used
in our network. If you have changed your network workgroup to
anything other than WORKGROUP it may have "issues" too. My
network PC's workgroup is HOME, so changing the smb.conf file
to that workgroup name helped a lot.