I've merged the latest swig-rb fixes to 1.6.x, rerun 'make check', as well as all the binding tests, and everything looks good to me. As I recall, there were a few Windows failures in 1.6.10, so in my paranoia, I'd request folks that encountered those to place rerun the tests and verify that they have been fixed. Assuming I don't get any reports of failures or error, I'll role the 1.6.11 tarballs tomorrow morning sometime (CDT).
Cheers, -Hyrum