In the jungle, when the big ape speaks, everybody listens. In the computer jungle, Microsoft is the big ape. Yesterday, the big ape burped.
Yesterday was the second Tuesday of the month, aka "Patch Tuesday". And Microsoft issued a patch array that was described by one Microsoft MVP as "brutal".
If you (or your readers) suddenly start seeing problems using Blogger, or accessing blogs, you might want to carefully consider what changes were recently made to your computer (your readers computers). It's possible that patches being made available this week, in many cases automatically (and without concern by the computer owner), may cause interesting problems.
All problems are not caused by Blogger. Really.