Trivia in my head today

I'm getting constant "invalid URL" messages. I cleared out my cache. That helped for all of 1 visit and then I was back to the error messages. No matter how I come in -- previously used link, typing enough of the URL till I get in or trying a short cut button on my browser, I'm getting more invalid URL messages than accesses.

I'm having no problems with any other site.

It's frustrating.