Comment 9 for bug 971613

same issue. after upgrading to ubuntu 12.04 pidgin does not start anymore.

Pidgin 2.10.3 (libpurple 2.10.3)

The program 'Pidgin' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadRequest (invalid request code or no such operation)'.
  (Details: serial 37 error_code 1 request_code 154 minor_code 19)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)