js error - linux install

Tried the Tbird support group, no joy.

Error console showing 3 diff js errors.

Just to mention it in passing:

Error involving gloda, on which a bug had been filed and closed - no 
discernible effect on performance but can't really tell.


2nd one, also in passing (unknown effect) is:

Error: [Exception... "Component returned failure code: 0x80004001 
(NS_ERROR_NOT_IMPLEMENTED) [nsIRequest.name]"  nsresult: "0x80004001 
(NS_ERROR_NOT_IMPLEMENTED)"  location: "JS frame :: 
file:///opt/thunderbird/components/nsLoginManager.js :: anonymous :: 
line 315"  data: no]
Source File: file:///opt/thunderbird/components/nsLoginManager.js
Line: 315

Updated to TB 3.1.6 and haven't seen it again yet.

3rd error is the one with noticeable effect, to wit, Tbird will not a 
advance to next unread message while reading a newsgroup thread with 
message being read in its own window (not tab or message pane - haven't 
tested them - yet).
This is not consistent, seems to be off and on.  I wouldn't know what to 
look at in various message headers, if in fact the problem may be there.

The error:

Error: An error occurred executing the cmd_nextUnreadMsg command: 
[Exception... "'[JavaScript Error: "aParent is null" {file: 
"chrome://messenger/content/msgViewNavigation.js" line: 69}]' when 
calling method: [nsIController::doCommand]"  nsresult: "0x80570021 
(NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)"  location: "JS frame :: 
chrome://global/content/globalOverlay.js :: goDoCommand :: line 96" 
data: yes]
Source File: chrome://global/content/globalOverlay.js
Line: 100

I'm not a programmer so cannot devine what the problem is.

Anyone know of  way to fix this?
Or should I go to the dev.Tbird group?

Thanks for any input.

jg