There are 3 sections to the 4" hummingbird block, and I thought I had the largest (and thus easiest) one completed. But either I trimmed one piece incorrectly, or didn't use enough fabric <sigh> so the upper left corner is missing a crucial amount of white background. (For those who don't PP, that white you see is the paper backing.)
Looks like I'll be starting from scratch again. At least it's only 9:30 so I still have plenty of morning left - and the other good news is that I only had to rip one seam, so I was on the right track at least!