Page 1 of Toshiba SD-3109(chipped) menu lockup?

Hi, just wondering if I`m the only one with this minor problem...

I have a chipped Toshiba SD-3109 (I think that`s the codename for it) and I`ve noticed a few times that if I`m going through a lot of DVD menus, for example exploring all the extras or setup options, it sometimes locks up and has to be turned off and on again (via the remote).

It`s only happened three or four times, and only once been annoying, but does it happen to anyone else? I`ve never heard a bad word about the Toshiba players and it`s perfect in every other way *, so maybe the problem is due to the modifications done to it. Also, I don`t know which firmware version I have -- would it be safe to upgrade anyway given the machine is chipped?

* Except you can`t have on-screen displays without that fusking annoying flashing multi-angle icon wHICH I WANT TO DIE...[takes pills], and you can`t tell it not to output sound from the SCART sockets meaning I have to turn my telly down when watching DVDs using the DD/DTS amp.

Ta for any info.