Glo Glo crashes when changing margins - should I change it?

Hello,

I just got my Glo four days ago (bought it for the light feature, had a Nook Simple Touch, I'm generally very pleased with the Glo).

But, my Glo crashes (most of the time it freezes and I have to reset it, twice it just rebooted by itself) when I try to change the margins on a sideloaded EPUB.

I have read other Threads and understand that I cannot actually change the margins because the EPUB file has restrictions and I (think) I know how to take them off with Calibre.
I have also verified that when using a kEPUB I can change the margins OK.

I'm OK with the Glo not being able to adjust the margins on some EPUBs but I'm not that OK with the crash.

So, if this is a purely a software issue then a future upgrade will hopefully cure it, but, more importantly, taking my Glo back and asking for another one would not solve the problem.

On the other hand, if this is not purely a software issue then an exchange may work. It is not that I need to change the margins (in fact I like the text to occupy the whole screen) but I would rather not have a device that crashes.

So, has anyone else experienced this? If not then I'll go change it for another Glo.
If this happens to everybody's Glo then it's a software issue.

Thank you.