I can get v.29 to you if you really want it, however, I don't think it is a temp issue. Are you using CSXCV and Cyber Commander, or MC2's with a CTL remote (TT1 or TT5)? If so, then I suspect it is a setting in whatever you are using as a transmitter.
On a CC, you should have a red dash in the column for the light, if not, then the model lamp is turned off in the CC and needs to be set accordingly.
On the PW stuff, I believe you can have a timeout set in the transmitter or reciever. This would be adjusted in the PW utility. For any specifics, however, you will need to contact Pocket Wizard directly. 802-658-0038 x572 or
http://www.pocketwizard.com/contact/inquiry/I would check these settings, if applicable, before reverting firmware.