Please include your system info as requested at https://github.com/ValveSoftware/steam-for-linux#reporting-issues

Can confirm, same problem happening here

Running Steam on ubuntu 14.04 64-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(0_client)
Uploading dump (out-of-process) [proxy '']
/tmp/dumps/crash_20140305222450_1.dmp
/home/boncey/.local/share/Steam/steam.sh: line 755:  5761 Segmentation fault      (core dumped) $STEAM_DEBUGGER "$STEAMROOT/$PLATFORM/$STEAMEXE" "$@"
mv: cannot stat ‘/home/boncey/.steam/registry.vdf’: No such file or directory
Installing bootstrap /home/boncey/.local/share/Steam/bootstrap.tar.xz
Reset complete!
Restarting Steam by request...
Finished uploading minidump (out-of-process): success = yes
response: CrashID=bp-2e20aa9a-79d6-42ae-8c07-2f0872140305
Running Steam on ubuntu 14.04 64-bit
STEAM_RUNTIME has been set by the user to: /home/boncey/.local/share/Steam/ubuntu12_32/steam-runtime
Installing breakpad exception handler for appid(steam)/version(0_client)
Uploading dump (out-of-process) [proxy '']
/tmp/dumps/crash_20140305222451_1.dmp
/home/boncey/.local/share/Steam/steam.sh: line 755:  5888 Segmentation fault      (core dumped) $STEAM_DEBUGGER "$STEAMROOT/$PLATFORM/$STEAMEXE" "$@"
Finished uploading minidump (out-of-process): success = yes
response: CrashID=bp-f6163feb-a4bd-4276-bdeb-a06182140305

Specs:
2x AMD Radeon HD 7970s in Crossfire
AMD FX 8Core CPU overclocked to 4.6 GHz
Ubuntu 14.04 Beta 1
16GB of Ram

Is there a workaround to downgrade to fix this or?

On 13.10 my graphics drivers are screwed.

Similar crash for me. Was working fine last week.

Running Steam on ubuntu 14.04 64-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element
Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 78: saw unknown, expected number
[0319/194717:WARNING:proxy_service.cc(958)] PAC support disabled because there is no system implementation
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Recovering manager mutex
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Generating new string page texture 2: 48x256, total string texture memory is 49.15 KB
Generating new string page texture 3: 384x256, total string texture memory is 442.37 KB
Installing breakpad exception handler for appid(steam)/version(1395164792_client)

(steam:5071): Gtk-WARNING **: Unable to locate theme engine in module_path: "oxygen-gtk",

(steam:5071): Gtk-WARNING **: Unable to locate theme engine in module_path: "oxygen-gtk",
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Adding licenses for the following package(s): 0, 2481, 7877, 8538, 11072, 13054, 17111, 27186, 27531, 28315
roaming config store loaded successfully - 1152 bytes.
migrating temporary roaming config store
Installing breakpad exception handler for appid(steam)/version(1395164792_client)
Uploading dump (out-of-process) [proxy '']
/tmp/dumps/crash_20140319194716_1.dmp
/home/jim/.local/share/Steam/steam.sh: line 755: 5071 Segmentation fault (core dumped) $STEAM_DEBUGGER "$STEAMROOT/$PLATFORM/$STEAMEXE" "$@"
Finished uploading minidump (out-of-process): success = yes
response: CrashID=bp-6d04ddb2-8917-4af7-90a7-ddc492140319

Yes it was thank you.

Today I installed the newest SteamOS DVD on my computer. I was prepared for breakage, but it hit hard anyway. Thanks to this crash here (the fglrx driver installed automatically) I had to wrestle with lightdm that looped in effort to start and steam that refused to install. The second I used update-alternatives to switch to mesa, the installer rendered with swrast and now is in middle of download.

EDIT

I am not sure what I said about swrast is true anymore. However, it is a fact that the Steam installed correctly. Now I switched back to fglrx and surprise! It still works!