I have a problem with signing document in PDF with certificate (on card). When I follow typical path - Tools, Certificate and then I put box where signature should be added, program asks me to save the file, but after that, program freezes and I don't get window where I should write pin to sign the document (I'm using certificate from Polish organization KIR). I have to kill the process and close Acrobat Reader to see this window, but signature won't be recognized then. I asked support in KIR, and they told me that they know about this problem, but can't do anything, and I have to follow Adobe support. Somtimes reinstaling Acrobat Reader helps, but not always.