When I press Ctrl or Shift or Alt in game it crashes (segfault). I tried to get a stacktrace with gdb, but as long as the game is compiled without symbols, stacktrace is not helpful.

ExecCommandLine: "/mnt/a/Steam/ubuntu12_32/steam steam://run/15400"
ExecSteamURL: "steam://run/15400"
System startup time: 18,65 seconds
ExecCommandLine: "/home/ivan/.steam/root/ubuntu12_32/steam steam://open/driverhelperready"
ExecSteamURL: "steam://open/driverhelperready"
Generating new string page texture 67: 64x256, total string texture memory is 376,83 KB
Generating new string page texture 68: 384x256, total string texture memory is 770,05 KB
Game update: AppID 15400 "Harvest: Massive Encounter", ProcID 4298, IP 0.0.0.0:0
ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.
ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.
ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.
Setting breakpad minidump AppID = 15400
Steam_SetMinidumpSteamID: Caching Steam ID: 76561198077982689 [API loaded no]
saving roaming config store to 'sharedconfig.vdf'
roaming config store 2 saved successfully
Installing breakpad exception handler for appid(gameoverlayui)/version(20130111144324_client)
Installing breakpad exception handler for appid(gameoverlayui)/version(1.0_client)
Installing breakpad exception handler for appid(gameoverlayui)/version(1.0_client)
Installing breakpad exception handler for appid(gameoverlayui)/version(1.0_client)
[0113/201246:ERROR:object_proxy.cc(239)] Failed to call method: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.NetworkManager was not provided by any .service files
[0113/201246:WARNING:proxy_service.cc(646)] PAC support disabled because there is no system implementation
Segmentation fault
Game removed: AppID 15400 "Harvest: Massive Encounter", ProcID 4299
saving roaming config store to 'sharedconfig.vdf'
roaming config store 2 saved successfully

Note that I use workaround described at https://wiki.archlinux.org/index.php/Steam#Harvest:_Massive_Encounter (custom run_harvest script). Without it the game doesn't work at all. Content of my run_harvest script:

!/bin/bash

INSTDIR="dirname \"$0\"" ; cd "${INSTDIR}" ; INSTDIR="pwd"
export LD_LIBRARY_PATH=${INSTDIR}/bin:~/.steam/bin
exec ./Harvest

System Information:
Processor Information:
Vendor: GenuineIntel
Speed: 2666 Mhz
2 logical processors
2 physical processors
HyperThreading: Unsupported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Unsupported
SSE42: Unsupported

Network Information:
Network Speed:

Operating System Version:
Ubuntu 12.10 (64 bit)
Kernel Name: Linux
Kernel Version: 3.5.0-21-generic
X Server vendor: The X.Org Foundation
X Server release: 11300000

Video Card:
Driver: NVIDIA Corporation GeForce 9800 GTX/9800 GTX+/PCIe/SSE2

Driver Version:  3.3.0 NVIDIA 304.43
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 60 Hz
VendorID:  0x10de
DeviceID:  0x612
Number of Monitors:  1
Number of Logical Video Cards:  1
Primary Display Resolution:  1280 x 1024
Desktop Resolution: 1280 x 1024
Primary Display Size: 14,80" x 11,85"  (18,94" diag)
                                        37,6cm x 30,1cm  (48,1cm diag)
Primary Bus: PCI Express 16x
Primary VRAM: 512 MB
Supported MSAA Modes:  2x 4x 8x 16x 

Sound card:
Audio device: SigmaTel STAC9221 A1

Memory:
RAM: 3261 Mb

Miscellaneous:
UI Language: English
LANG: ru_RU.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 1906795 Mb
Largest Free Hard Disk Block: 13939 Mb

Installed software:

Recent Failure Reports: