NetBIOS name resolution problems between XP PCs

Setup:
PC #1 - Windows XP Home SP2
PC #2 - Windows XP Home SP2

PC #1 - running Computer Browser service (workgroup server)
PC #2 - workgroup client

Each PC - is sharing a folder called C:\Temp


Scenario:
From PC #1, I can navigate into the "My Network Places", then into the
workgroup and I see
both PCs. Then can navigate into each PC and into the Temp share and
click either the "Back" button or the "Up" button to navigate back the
workgroup level. No errors.

From PC #2, I can navigate into the "My Network Places", then into the
workgroup and I see
both PCs. Then can navigate into each PC and into the Temp share and
click either the "Back" button or the "Up" button to navigate back the
workgroup level. The problem occurs when I click the "Back" button to
go back to the workgroup name level I receive the error:

"Workgroup" is not accessible. See administrator ..."
"No permission to use the network resource"
"Specified network name no longer available"

I switched the server/client activities of the PCs and the same thing
occurs. Meaning PC #1 would produce the errors mentioned above. So the
problem is not specific to PC #2.

I've been researching and searching for resolutions for two days, but
no luck so far to remedy this situation. I just can't find anyone
describing the same scenario. Is there a bug in XP's NetBIOS name
resolution, or in Explorer (My network Places), or is there some
network buffer issue?