Unable to create collection on SCCM 2007 / Logs not updating

Would like to share one of the weird issues we faced in our SCCM infra and their technet forum links with solution. Hope you all SCCM Folks will find it useful..

Unable to create any new collection on SCCM 2007
-- http://social.technet.microsoft.com/Forums/en-US/configmgrgeneral/thread/1b38b94a-db80-4e48-bda1-94af825eb78e
 
One fine day at my office, ConfigMgr 2007 reported an error while trying to create any new collection.

Error Detail: “Form that is already visible cannot be displayed as a modal dialog box. Set the form's visible property to false before calling ShowDialog.”

Click the below forum link for more details and resolution: 
http://social.technet.microsoft.com/Forums/en-US/configmgrgeneral/thread/1b38b94a-db80-4e48-bda1-94af825eb78e
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Troubleshooting the SCCM'07 Collections issue lead to a new problem due to a regedit step which was not reverted back after testing.

ConfigMgr 2007 Logs not updating
-- http://social.technet.microsoft.com/Forums/en-US/configmgrsum/thread/c9d2a699-e822-4249-b317-8873d7b56e9b
 
Site Reset and Site Repair did not help, and finally found that the Tracing was disabled in registry.

Check the below forum link for more details and resolution: 
http://social.technet.microsoft.com/Forums/en-US/configmgrsum/thread/c9d2a699-e822-4249-b317-8873d7b56e9b

Ref: http://social.technet.microsoft.com/Forums/en-US/user/threads?user=ucrajee