I have reCAPTCHA 2.5 activated at thequalitydoctor.com, and it worked fine until this morning. Attempts to add a comment by clicking on Comments at bottom of a post gave a 404 for the comments page. This behavior was stable; every comment link gave the same result, a 404. I couldn't make the problem go away until I deactivated reCAPTCHA.
Then the site worked as expected.
I reactivated reCAPTCHA, and the site works okay now. I'll watch for repeats of this bad behavior, but so far, I can't force or reproduce the glitch.
If anybody's seen this before and knows a workaround or fix, please let me know.
Mitch (aka DocTeeRex)