In docs/readme.html it says:
Please also be as detailed as you can in your report, if possible list the steps required to duplicate the problem. If you have a fix which you are VERY SURE works (and is consistent with our coding guidelines) and does not introduce further problems or incompatibilities please let us know. However only include it in the bug report if you really must, if we need it we'll ask you for it.

The last bit gives the impression that patches aren't really wanted however recently this case has begun to change?