Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5)
From a clean restore, I manually enabled the multitasking toggle, so I'm afraid I'm not sure what you're talking about.
Once you have multitasking actually enabled and you can use it, all you need to do to get the toggle like I have it is to copy and paste this text (without quotes) into /Applications/Preferences.app/General.plist
"** *<dict>
** * *<key>cell</key>
** * *<string>PSGroupCell</string>
** * *<key>id</key>
** * *<string>Rotation_Switch_Action_Group</string>
** * *<key>isRadioGroup</key>
** * *<true/>
** * *<key>label</key>
** * *<string>Rotation_Switch_Action_Group_Label</string>
** *</dict>
** *<dict>
** * *<key>cell</key>
** * *<string>PSListItemCell</string>
** * *<key>id</key>
** * *<string>Lock_Rotation_Button</string>
** * *<key>label</key>
** * *<string>Lock_Rotation</string>
** *</dict>
** *<dict>
** * *<key>cell</key>
** * *<string>PSListItemCell</string>
** * *<key>id</key>
** * *<string>Mute_Button</string>
** * *<key>label</key>
** * *<string>Mute</string>
** *</dict>
** *<dict>
** * *<key>cell</key>
** * *<string>PSGroupCell</string>
** * *<key>footerCellClass</key>
** * *<string>MultitaskingGestureExplanationView</string>
** * *<key>requiredCapabilities</key>
** * *<array>
** * * *<string>multitasking-gestures</string>
** * *</array>
** *</dict>
** *<dict>
** * *<key>cell</key>
** * *<string>PSSwitchCell</string>
** * *<key>default</key>
** * *<true/>
** * *<key>defaults</key>
** * *<string>com.apple.springboard</string>
** * *<key>key</key>
** * *<string>SBUseSystemGestures</string>
** * *<key>label</key>
** * *<string>Multitasking Gestures</string>
** * *<key>requiredCapabilities</key>
** * *<array>
** * * *<string>multitasking-gestures</string>
** * *</array>
** *</dict>
** *<dict>
** * *<key>cell</key>
** * *<string>PSGroupCell</string>
** *</dict>"
That also includes the rotation lock/mute toggle.
You're going to have to paste this into the correct spot for it to work proper. Your phone will have the entries regarding rotation/mute lock that you see above. So match those up, highlight it and paste over the old ones and you'll be good to go. Respring and it should be working.
Please forgive me if that doesn't make sense, I'm half asleep and typing this on my diePhone, which is a bit of a pain. If you have questions, please ask before you do anything so you don't bork your phone and get mad and yell-y at me.
P.S. I did not use SnowBreeze and I do not preserve my basebands or use any sort of unlock. I use iFile to edit plists using the text viewer method.