RiverOwl wrote:
Don't Panic!
By turning the block 90 degrees, it is easier to see that the problem seams are the ones inside the white square I have drawn. I would suggest that you start with the left hand seam of the two and re-stitch starting about 2 threads nearer the cut edge and finish near the centre of the white flower. Remove the previous line of stitching, press, then put it under your cutting ruler and see if that has straightened things out enough, if not move on to the next seam (again, take the taper lower than the box is drawn).
By placing your clear 6"x12" (or whatever size it is) ruler over the block, it is quite easy to analyse which strips are the culprits and where abouts along the seam it starts to go squint.
I have been working my way through all of my blocks double checking them and after a bit my eyeballs become calibrated enough to look at a set and know whether they will need restitching without using the ruler, I do however use the ruler to make sure that I adjust the correct seam, and to work out how much by, but mostly it is either 1 or 2 threads max.
Hope this helps