How to fix: XML Parsing Error: XML or text declaration not at start of entity

I noticed the following error message while checking RSS feeds belongs to a client.

XML Parsing Error: XML or text declaration not at start of entity
Location: http://www.domain.com/file.rss
Line Number 2, Column 1:<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
^

Unrar solution on CentOS

For CentOS 32bit:

rpm -i http://dag.wieers.com/rpm/packages/unrar/unrar-3.7.4-1.el5.rf.i386.rpm

How to fix: Drupal "user warning: Unknown column..." error.

Exact error message:

...
user warning: Unknown column 'page' in 'where clause' query: [function_name] /* [username] : [function_name] */ SELECT n.nid FROM node n WHERE n.type = page AND n.status = 1 ORDER BY n.created DESC LIMIT 0, 5 in /home/user/public_html/path/to.module on line 294.
...

How to fix buffer_get_ret: trying to get more bytes 4 than in buffer

I got this error after adding new user to the system (CentOS). The user key is generated using PuTTY Key Generator (PuTTYgen for short).

Exact error (in /var/log/secure):

Kaliphonia.Com
Is about anything. Mostly from my daily life. Such as troubleshooting server issues; cPanel and Webmin How To's; Windows bug fixes; PHP coding; shell scripting; miscellaneous web stuffs worth noted; Wordpress, Joomla & Drupal How To's; Et cetera. There are also tools which I coded in my free time, feel free to use them. Any comment will be appreciated.

OOT, did you know Agnetha Fältskog has an amazing voice? She is my favourite just after Linda Ronstadt. They both are in my playlist :-)