To link to specific section of an article, such as the Administrative Panels->Link Categories section you can use the # sign. The link in the previous sentence looks like this: [[Administration_Panels#Link Categories|Link Categories Administrative Panels->Link Categories section]]
Codex Guidelines recommend a signature when making entries to User Talk pages. I saw Carthik's cool signature line, so, from WikiMedia Help, found you can customize how your signature gets rendered when you use the wiki text conversion "~~~~".
So, in my Preferences Nickname field I put:
The wiki text conversion renders the ~~~~ to something like this:
And, in the User's Talk page it looks like this:
Seems like this error occurs when database is busy? Usually retrying solves...
Database error From Codex A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was: (SQL query hidden) from within function "MediaWikiBagOStuff:_doquery". MySQL returned error "1062: Duplicate entry 'codexwo_mw:messages:Sitenotice' for key 1 (localhost)".
<pre style="white-space:normal;"> BOX Contents </pre>