If you try to get Pantone 543 (or a number of other Pantone colors) in Adobe InDesign CS6’s Color panel, you’ve likely run into an annoying glitch. You simply can’t find it by typing it in as you could with CS5.
InDesign Secrets describes the CS6 Pantone+ glitch in detail, and offers some workarounds.
What I find most annoying about this glitch is that Adobe hasn’t fixed it with a small update yet, and that Pantone doesn’t make the older libraries available for easy download. Hopefully, the new InDesign CC (due to ship later this month) fixes the problem.