This usually happens when I play online multiplayer. Maps that have been occurring such as 'LS_FALL1NGS1LENT', 'LS_FALLOUT_BUNKER', 'LS_LAKE' and other similar names. I know these maps have been designed by other users, not soldat itself.
The soldat version I play is 1.6.0 (c). I can't be certain about the names because it happens when I kill or get killed by that particular user and it has happened quiet a few times. I've asked someone about that problem during a match and he said its 'possibly' because their nicknames are too long. Another thing to which why I'm getting these access violation notification is because recently I've been joining this Infiltration server that contains Bots with different names. So it wouldn't be 'Poncho, Terminator' etc. Game name : IP for that server [(WM)Last Stand : 109.233.88.2]
I've had a look at my soldat settings in regards to font.ini and I've matched them all with font.help or something. So pretty much the numbers are all identical to what font/help is shown.