We're seeing a number of problem reports, in Blogger Help Forum: Something Is Broken , about various problems which involve CAPTCHA verification processes. The symptoms are fairly diverse. Some blog owners report problems with commenting, on their blogs. Some report problems with high posting volumes. Some report problems getting abuse review requested, for their blogs falsely accused of hosting abusive content. The reporting volumes, and perceived urgency, for each case, will vary.
What Blogger won't tell you