Issue Report: SPAZ loses keyboard and mouse focus after achievement

[ZiggySpelldust]

I have not been able to get gameoverlayrenderer.so to work, so I have disabled steam's in-game overlay. This allowed games such as SPAZ and TF2 to be played. However, whenever I receive an achievement, a new achievement window is opened, causing the game to lose focus. When returning to the game (through alt-tab or clicking the icon), I lose all keyboard and mouse controls. I have yet to find a way to get control back, causing me to have to kill the game. It is probably worth noting that I use an Optimus Nvidia laptop, and use optirun to run steam.

Here's system info:
Processor Information:
Vendor: GenuineIntel
Speed: 2401 Mhz
4 logical processors
2 physical processors
HyperThreading: Supported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Supported

Network Information:
Network Speed:

Operating System Version:
Ubuntu 12.04.1 LTS (64 bit)
Kernel Name: Linux
Kernel Version: 3.2.0-34-generic
X Server vendor: The X.Org Foundation
X Server release: 11103000

Video Card:
Driver: NVIDIA Corporation GeForce GT 540M/PCIe/SSE2

Driver Version: 4.3.0 NVIDIA 310.14
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 60 Hz
VendorID: 0x10de
DeviceID: 0xdf4
Number of Monitors: 1
Number of Logical Video Cards: 2
Primary Display Resolution: 1366 x 768
Desktop Resolution: 1366 x 768
Primary Display Size: 13.54" x 7.60" (15.51" diag)
34.4cm x 19.3cm (39.4cm diag)
Primary VRAM: 1023 MB

Sound card:
Audio device: Intel CougarPoint HDMI

Memory:
RAM: 5880 Mb

Miscellaneous:
UI Language: English
LANG: en_US.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 294231 Mb
Largest Free Hard Disk Block: 222861 Mb

Installed software:

Recent Failure Reports:
Fri Dec 14 15:16:30 2012 GMT: file ''/tmp/dumps/assert_20121214101627_1.dmp'', upload yes: ''CrashID=bp-b848d69c-69be-4c23-b66a-68bc12121214''
Sat Dec 15 04:18:15 2012 GMT: file ''/tmp/dumps/assert_20121214231814_2.dmp'', upload no: ''HTTP response code said error''