PHP 5.3.4 error in jpg files

after alter for php 5.3.4 my script not support jpg files.

Fatal error: Image: Imagetype (jpg) not supported for reading. in /home/colegiob/public_html/adm/Image_Toolbox.class.php on line 444

Looks like as of version 5.3 PHP returns image/jpeg instead of image/jpg as MIME type. So - modify the entry for jpg files in $_types around line 99 of the Image_Toolbox script to:

'mime' => 'image/jpeg'

My PHP version is 5.3,i already have 'mime' => 'image/jpeg' in line 99 but still i m getting same error "Undefined index:JPG support" and "Fatal error: Image:Imagetype(jpg) not supported for reading". Can you tell me what is the problem in my Image_Toolbox script.

Line 186:
Change $gd_info['JPG Support']
in
$gd_info['JPEG Support']