I had the similar problem with OziExplorer under Wine - could not open GPS port on Lubuntu 12.04.
I noticed (after reading this) that /dev/ttyUSB0 belongs to 'dialout' group. Then I simply added my account to this group, and this solved my problem. Thanks for pointing this out!
The udev rule is probably a better solution, but this one works as well.
I had the similar problem with OziExplorer under Wine - could not open GPS port on Lubuntu 12.04.
I noticed (after reading this) that /dev/ttyUSB0 belongs to 'dialout' group. Then I simply added my account to this group, and this solved my problem. Thanks for pointing this out!
The udev rule is probably a better solution, but this one works as well.