Lockscreen settings after firmware update

[tbvnz]

My lockscreen setting for timeout> never has disappeared since update. I found this setting quite useful when using the Zune app with my car stereo. All I had to do was set my phone in my cradle, shuffle songs and skip through what I didn't want to hear. Now one touch operation is gone and looking at tiny music control buttons on lockscreen while driving is not an option. Can anyone help?