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i posted the image cuz i couldnt explain it with words myself, as you see i get a blank page when i click apparance and then magnifize options.
coud it be any plugin that im using or something i did wrong, i run an administrator account so i have no idea why its not letting me do it, it used to work fine, a few weeks ago,

this is the picture of the error im getting (photo bucket link)

i use chrome, then tried to open in explorer and it showed this error

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Tablet PC 2.0; .NET4.0C)
Timestamp: Tue, 27 Sep 2011 07:12:16 UTC

Message: 'this[...].style' is null or not an object
Line: 19
Char: 28969
Code: 0
URI: http://www.tripandtraveldr.com/en/wp-content/themes/magnifizine/includes/admin/jquery.1.3.1.min.js

i hope you guys can help me out
Thanks in advance

Nelson