What happes tmy (JB) if I upgrade to 4.2?

[Kalaharijack]

Hi Folks,
I recently bought the 7mpx Camera from the Itunes store, Today as I was updating some apps and my 7mpx camera was deleted, Evidently I must upgrade to itunes 4.2 before I can reinstall it !!

My phone has been jailbroken, IF I do upgrade to 4.2 will I loose my jailbreak?
Thanks

[Simon]

Any restore or update wipes your jailbreak. You can jailbreak again on 4.2.1 but depending on your device it may be a tethered jailbreak.