I'm not able to reproduce this using the latest SVN, but Jboy is right -- judging by the screenshot, your map appears to be corrupted. Maps aren't saved in the save file directly, so a problem with your map files could explain why I'm not able to reproduce the issue. Given the exit in the bottom right of your screen, this doesn't look like a fallback map being generated when the map can't be loaded. Instead, I suspect your map file for the bank is being read in, but it's either reading incorrectly in the Linux build, or your data files are corrupt.
One test you can do is to check out if the Nuclear Plant in the outskirts of the city is also giving you a weird map layout and potentially segfaulting. It's the only other location that uses CSV files to store map data, the way the Bank does.
If the Nuclear Plant is similarly problematic, then it sounds like the Linux version isn't handling the new maps correctly. They're text files, so it could be another line endings issue; running them through dos2unix may be worth trying (though I don't remember where the Linux version keeps its data files off the top of my head).
If the Nuclear Plant seems fine, it's probably just an issue with one of your files being corrupted. Rebuilding the game or just replacing the two .csv files regarding the Bank should fix it, in that case.
That screen mockup...
How long did that take to make? o_o
Heheh, I assume it's an actual capture of the screen. You can do something similar in Windows by right clicking, selecting "Mark", and dragging the flashing box over the screen. For example, this is what the Bank map SHOULD look like when you first show up:
American Bank Corp, Level 1
#-CODE NAME------------SKILL---WEAPON---------ARMOR----------HEALTH---TRANSPORT-
1 Fiona Cheney 15/0 .38 Rev (XX) Clothes Liberal On Foot
2
3
4
5
6
--------------------------------------------------------------------------------
W,A,D,X - Move G - Get Loot M - Map E - Equip | |
N - Options S - Wait L - Reload | |
O - Change the squad's Liberal order U - Use | |
# - Check the status of a squad Liberal V - Evade | |
0 - Show the squad's Liberal status K - Kidnap | EXT EXT EXT EXT EXT |
F - Fight! T - Talk R - Release hostage | |
| |
| SQUAD EXT |
| |
|.......... ..... |
|.......... ..... EXT |
|.......... ..... |
| ----- |
| |
| |
---------------------------