Do will deterministically crash when text is dragged over it. To reproduce:
a) Set interface to Docky
b) Select some text
c) Drag this text over the dock. Do will now crash, with:
Gdk-ERROR **: The program 'Do' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadAtom (invalid Atom parameter)'.
(Details: serial 11547 error_code 5 request_code 24 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.)