Having been testing a Blackberry 8310 I had been wiping it several times so as to work off a blank slate. However, after one reset I found the Setup Wizard had changed, suddenly on the Enterprise Activation screen I was being given the option of activating a personal e-mail account, an option that had never been there before. I switched to a work e-mail account, but now the device would timeout on activation. Enterprise Activation also disappeared from the Advanced options sections, being accessible only through the Setup Wizard.

This continued through several wipes... until today when I wiped it and suddenly the personal e-mail option was gone again and now activation worked and Enterprise Activation was once more an option on the Advanced settings screen.

WTF?

edit

What are the significance of service books and how are they updated?

Could this be related to an activation issue, or is that likely coincidence?