Created attachment 2834 
Fix suggested by Karl Blammo

Dragging data like text over Thunar’s directory crashes Thunar. No backtrace possible but an error on terminal:

> The program 'Thunar' received an X Window System error.
> This probably reflects a bug in the program.
> The error was 'BadAtom (invalid Atom parameter)'.
>   (Details: serial 5257 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.)

This was already mentioned once on thunar-dev and a patch was provided for this. But since there never was a report for this it seems to have been missed:

http://www.mail-archive.com/thunar-dev@xfce.org/msg03850.html

Patch is also attached to this report to prevent it from getting lost.