Hello, I have exactly same problem.
It happens right after it finishes looking up for another player (main screen with blinking magnyfying glass dissapears). Then its just this black screen with rotating blue square. I let it run for 10 minutes, no change.
When holding mouse button and moving mouse, I can see cursor. And when pressing ESC, I can get to the menu, but thats all.
I also tried using P for private game, but whenever I click the game name button to join someone, it does nothing at all (while my AV and FW are still disabled)
Tried disabling Comodo Firewall and Avast Antivirus, restart game, and it is still same.
Tried running on lowest resolution, lowest quality, fullscreen, windowed..
Out of ideas.
Using 1.3 alpha for PC.
Here is my output log:
GfxDevice: creating device client; threaded=0
Version: Direct3D 9.0c [ati2dvag.dll 126.96.36.19955]
Renderer: Radeon X1650 Series (Omega 3.8.442)
VRAM: 512 MB (via registry)
Caps: Shader=30 DepthRT=1 NativeDepth=1 NativeShadow=0 DF16=1 DF24=1 INTZ=0 RAWZ=0 NULL=0 RESZ=0 SlowINTZ=0
desktop: 1366x768 60Hz; virtual: 1366x768 at 0,0
<I> Initializing (RawInput).
<RI> Input initialized.
Is there any other particular info you need to know to help you resolve this issue? Willing to help.
EDIT: I tried original Catalyst, 10.2 (latest for my card), 8.6 (most stable for my card - except for Omega Im normally using), 7.7 (just some random old to test). No change.