Gamehacking.org main site is way under optimized.

[final kaoss]

http://gtmetrix.com/reports/gamehacking.org/x1yubkcF

There's just a lot of unneccessary bandwidth being used as shown by that report. I can help cut this down with some specially made htaccess files that I created at vbulletin.org
That "leverage browser caching" is pretty much saying those items aren't being cached client side when they could & should be.. They even offer you minfied js & css files like this one which shaves off 45 KB http://gtmetrix.com/reports/gamehack...9d1c170e737.js

In the root, I would add this to the .htaccess

# Author: Final Kaoss (aka: Extreme-Gaming)
# Version 2.7
# Special Thanks Goes to W3Total Cache for much of the htaccess rules
RewriteEngine on

# This file is only needed if you have set the Forum Component URL in your admincp and you are
# using the mod_rewrite option for friendly urls.  If this is the case, copy this file
# to your forum component stub directory.

# If you are having problems or are using VirtualDocumentRoot, uncomment this line and set it to your forum component directory.
# RewriteBase /vbtest/

# If you are having problems with the rewrite from content/ to content.php, uncomment this line to turn MultiViews off.
 Options -MultiViews



#Deny attempts to view the Htaccess file.
<Files .htaccess>
Order allow,deny
Deny from all
</Files>
# BEGIN Browser Caching/Headers
<IfModule mod_mime.c>
    AddType text/css .css
    AddType text/richtext .rtf .rtx
    AddType image/svg+xml .svg .svgz
    AddType text/plain .txt
    AddType text/xsd .xsd
    AddType text/xsl .xsl
    AddType video/asf .asf .asx .wax .wmv .wmx
    AddType video/avi .avi
    AddType image/bmp .bmp
    AddType application/java .class
    AddType video/divx .divx
    AddType application/msword .doc .docx
    AddType application/x-msdownload .exe
    AddType image/gif .gif
    AddType application/x-gzip .gz .gzip
    AddType image/x-icon .ico
    AddType image/jpeg .jpg .jpeg .jpe
    AddType application/vnd.ms-access .mdb
    AddType audio/midi .mid .midi
    AddType video/quicktime .mov .qt
    AddType audio/mpeg .mp3 .m4a
    AddType video/mp4 .mp4 .m4v
    AddType video/mpeg .mpeg .mpg .mpe
    AddType application/vnd.ms-project .mpp
    AddType application/vnd.oasis.opendocument.database .odb
    AddType application/vnd.oasis.opendocument.chart .odc
    AddType application/vnd.oasis.opendocument.formula .odf
    AddType application/vnd.oasis.opendocument.graphics .odg
    AddType application/vnd.oasis.opendocument.presentation .odp
    AddType application/vnd.oasis.opendocument.spreadsheet .ods
    AddType application/vnd.oasis.opendocument.text .odt
    AddType audio/ogg .ogg
    AddType application/pdf .pdf
    AddType image/png .png
    AddType application/vnd.ms-powerpoint .pot .pps .ppt .pptx
    AddType audio/x-realaudio .ra .ram
    AddType application/x-shockwave-flash .swf
    AddType application/x-tar .tar
    AddType image/tiff .tif .tiff
    AddType audio/wav .wav
    AddType audio/wma .wma
    AddType application/vnd.ms-write .wri
    AddType application/vnd.ms-excel .xla .xls .xlsx .xlt .xlw
    AddType application/zip .zip
</IfModule>
<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresByType text/css A2628000
    ExpiresByType text/richtext A3600
    ExpiresByType image/svg+xml A3600
    ExpiresByType text/plain A3600
    ExpiresByType text/xsd A3600
    ExpiresByType text/xsl A3600
    ExpiresByType video/asf A2628000
    ExpiresByType video/avi A2628000
    ExpiresByType image/bmp A2628000
    ExpiresByType application/java A2628000
    ExpiresByType video/divx A2628000
    ExpiresByType application/msword A2628000
    ExpiresByType application/x-msdownload A2628000
    ExpiresByType image/gif A2628000
    ExpiresByType application/x-gzip A2628000
    ExpiresByType image/x-icon A2628000
    ExpiresByType image/jpeg A2628000
    ExpiresByType application/vnd.ms-access A2628000
    ExpiresByType audio/midi A2628000
    ExpiresByType video/quicktime A2628000
    ExpiresByType audio/mpeg A2628000
    ExpiresByType video/mp4 A2628000
    ExpiresByType video/mpeg A2628000
    ExpiresByType application/vnd.ms-project A2628000
    ExpiresByType application/vnd.oasis.opendocument.database A2628000
    ExpiresByType application/vnd.oasis.opendocument.chart A2628000
    ExpiresByType application/vnd.oasis.opendocument.formula A2628000
    ExpiresByType application/vnd.oasis.opendocument.graphics A2628000
    ExpiresByType application/vnd.oasis.opendocument.presentation A2628000
    ExpiresByType application/vnd.oasis.opendocument.spreadsheet A2628000
    ExpiresByType application/vnd.oasis.opendocument.text A2628000
    ExpiresByType audio/ogg A2628000
    ExpiresByType application/pdf A2628000
    ExpiresByType image/png A2628000
    ExpiresByType application/vnd.ms-powerpoint A2628000
    ExpiresByType audio/x-realaudio A2628000
    ExpiresByType application/x-shockwave-flash A2628000
    ExpiresByType application/x-tar A2628000
    ExpiresByType image/tiff A2628000
    ExpiresByType audio/wav A2628000
    ExpiresByType audio/wma A2628000
    ExpiresByType application/vnd.ms-write A2628000
    ExpiresByType application/vnd.ms-excel A2628000
    ExpiresByType application/zip A2628000
</IfModule>
<IfModule mod_deflate.c>
    <IfModule mod_setenvif.c>
        BrowserMatch ^Mozilla/4 gzip-only-text/html
        BrowserMatch ^Mozilla/4.0[678] no-gzip
        BrowserMatch bMSIE !no-gzip !gzip-only-text/html
        BrowserMatch bMSI[E] !no-gzip !gzip-only-text/html
    </IfModule>
    <IfModule mod_headers.c>
        Header append Vary User-Agent env=!dont-vary
    </IfModule>
    <IfModule mod_filter.c>
        AddOutputFilterByType DEFLATE text/css application/x-javascript text/html text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon
    </IfModule>
</IfModule>
<FilesMatch "\.(css|CSS|)$">
    <IfModule mod_headers.c>
        Header set Pragma "public"
        Header append Cache-Control "public, must-revalidate, proxy-revalidate"
    </IfModule>
    FileETag MTime Size
    <IfModule mod_headers.c>
         Header set X-Powered-By "Step by Step guide to speed up your VB4 (forum only)"
    </IfModule>
</FilesMatch>
<FilesMatch "\.(rtf|rtx|svg|svgz|txt|xsd|xsl|RTF|RTX|SVG|SVGZ|TXT|XSD|XSL|)$">
    <IfModule mod_headers.c>
        Header set Pragma "public"
        Header append Cache-Control "public, must-revalidate, proxy-revalidate"
    </IfModule>
    FileETag MTime Size
    <IfModule mod_headers.c>
         Header set X-Powered-By "Step by Step guide to speed up your VB4 (forum only)"
    </IfModule>
</FilesMatch>
<FilesMatch "\.(asf|asx|wax|wmv|wmx|avi|bmp|class|divx|doc|docx|exe|gif|gz|gzip|ico|jpg|jpeg|jpe|mdb|mid|midi|mov|qt|mp3|m4a|mp4|m4v|mpeg|mpg|mpe|mpp|odb|odc|odf|odg|odp|ods|odt|ogg|pdf|png|pot|pps|ppt|pptx|ra|ram|swf|tar|tif|tiff|wav|wma|wri|xla|xls|xlsx|xlt|xlw|zip|ASF|ASX|WAX|WMV|WMX|AVI|BMP|CLASS|DIVX|DOC|DOCX|EXE|GIF|GZ|GZIP|ICO|JPG|JPEG|JPE|MDB|MID|MIDI|MOV|QT|MP3|M4A|MP4|M4V|MPEG|MPG|MPE|MPP|ODB|ODC|ODF|ODG|ODP|ODS|ODT|OGG|PDF|PNG|POT|PPS|PPT|PPTX|RA|RAM|SWF|TAR|TIF|TIFF|WAV|WMA|WRI|XLA|XLS|XLSX|XLT|XLW|ZIP)$">
    <IfModule mod_headers.c>
        Header set Pragma "public"
        Header append Cache-Control "public, must-revalidate, proxy-revalidate"
    </IfModule>
    FileETag MTime Size
    <IfModule mod_headers.c>
         Header set X-Powered-By "Step by Step guide to speed up your VB4 (forum only)"
    </IfModule>
</FilesMatch>
# End Browser Caching/Headers

If logins on the forum are being affected by that, here's a quick fix for that too.

Fixing login issues with vbulletin 4.

found this recommendation about the login issue that you are experiencing. You may want to set the settings similar:
I would suggest you add your domains to your white list in vb options and then your cookies in vb and photopost set like this
cookie path /
cookie prefix bb
cookie domain .mysite.com
Example..
.www.video-game-chat.com

I have found that if I log into the front page the username is not showing at the top. However, if I login when checking a subforum, I am able to login successfully. I was also able to reply to the thread http://vgchat.info/forum/threads/166...me-3DS-Trailer without issues while being logged in.

Disable vbulletin content caching (since apache is handling that now)

AdminCP > Options > Server Settings and Optimization Options > Disable Content Caching: Set to yes

*Note these changes did not show immediately for me but they did show that they were working for me after roughly 15 minutes.