Adjacent tooltip texts crash pywebkitgtk in 10.04.

In a webkit frame, if you have two items with tooltip (title="something"), you can mouseover and see the tooltip text. Sometimes after moving the mouse to the other item it will give an error like:
The program received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadAlloc (insufficient resources for operation)'.
  (Details: serial 104666 error_code 11 request_code 53 minor_code 0)
  (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.)