The very first quilt I started to quilt (of my 5 waiting to be quilted) caught my attention after I got on the quilting frame.  I had this up on the design board, took pictures of it, showed it off to friends, crawled all over it on my hands and knees to get it sandwiched for quilting, etc., and right before I started quilting, I found an error.  Why couldn't I have seen this before I got to this point???  Can you see it? 

Look closer:

This block should be turned 90 degrees, so the points all line up.  Sigh....

After all getting it fixed, I decided to straight-line quilt it anyway.  At least getting it on the quilting frame showed me the error and I could fix it without ripping out a bunch of quilting too!