wow... that's quiite a complex one you have there...

just as a guide, i'm using 5800xm with both Garmin Mobile XT AND both Opera Mini & Mobile installed, but i have no problem like yours.

i'm just wondering, apart from mass memory, do you have microSD card in your phone too?

i would suggest you to do a hard reset on your phone, and to update to the latest firmware available.

then install Opera Mini into your phone's C:, but install your Garmin into Mass Memory (or MicroSD card, if available).

try that out and let us know how it fared.

nah... they just want to refuse to take up responsibility...
threaten them that you will make a complaint to Small Claims Tribunal.

but of course you better start doing it, get the complaints forms, etc etc...