Teeworlds 5.0 - black screen X error?

Ubunto 8.10, graphics card driver is i810.  This card does not support 3d accel at 24 bits.

Teeworlds up to 0.4.3 has worked fine, if sluggish.  Starting 0.5, the screen goes black and hangs.  Running teeworlds from the terminal, there appears to be an X error.  Can anyone confirm the cause of this error?  Is it due to a new requirement for 24bit color support, perhaps?  Any workaround?

Extract from the terminal output:

...
[49710fa3][binds]: bound mouse1 (323) = +fire
[49710fa3][binds]: bound mouse2 (324) = +hook
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  135 (XFree86-VidModeExtension)
  Minor opcode of failed request:  10 (XF86VidModeSwitchToMode)
  Value in failed request:  0x4e
  Serial number of failed request:  133
  Current serial number in output stream:  135
Locking assertion failure.  Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb7a7e7c7]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xb7a7e96e]
#2 /usr/lib/libX11.so.6 [0xb7eb2619]
...