After confirming a trade I was doing, and the other party confirming as well, steam crashed. The trade was successful nonetheless.

System info:

Processor Information:
Vendor:  GenuineIntel
Speed: 2534 Mhz
2 logical processors
2 physical processors
HyperThreading:  Unsupported
FCMOV:  Supported
SSE2:  Supported
SSE3:  Supported
SSSE3:  Supported
SSE4a:  Unsupported
SSE41:  Supported
SSE42:  Unsupported

Network Information:
Network Speed:  

Operating System Version:
Linux (64 bit)
Kernel Name:  Linux
Kernel Version:  3.7.9-104.fc17.x86_64
X Server Vendor:  Fedora Project
X Server Release:  11204000
X Window Manager:  Xfwm4
Steam Runtime Version:  steam-runtime-release-i386_2013-03-22

Video Card:
Driver:  ATI Technologies Inc. ATI Mobility Radeon HD 3650

Driver Version:  3.3.11672 Compatibility Profile Context
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 59 Hz
VendorID:  0x1002
DeviceID:  0x9591
Number of Monitors:  1
Number of Logical Video Cards:  1
Primary Display Resolution:  1920 x 1200
Desktop Resolution: 1920 x 1200
Primary Display Size: 14.45" x 9.06"  (17.05" diag)
                                        36.7cm x 23.0cm  (43.3cm diag)
Primary VRAM Not Detected

Sound card:
Audio device: IDT 92HD73C1X5

Memory:
RAM:  3950 Mb

Miscellaneous:
UI Language:  English
LANG:  en_US.UTF-8
Microphone:  Not set
Total Hard Disk Space Available:  98429 Mb
Largest Free Hard Disk Block:  17936 Mb

Recent Failure Reports:
Sat Mar 23 20:54:07 2013 GMT: file ''/tmp/dumps/crash_20130323215404_1.dmp'', upload no: ''HTTP response code said error''

I would attach the crash dump but it's partly a binary file