When adding 3 signatures to a document the 3rd one becomes invalid.
Then when removing the 1st or the 2nd one the invalid 3rd one becomes the 2nd one and turns valid.
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Unfortunately without clear steps to reproduce it, we cannot track down the origin of the problem.
Please provide a clearer set of step-by-step instructions on how to reproduce the problem.
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Sorry. I thought I was clear.
With "When adding 3 signatures to a document" I mean three different people try to sign the same document with their Digitial Signature.
With "the 3rd one becomes invalid." I mean when the 3rd person signs the document it's added signature is invalid. Invalid in the sense that the icon in the list of signatures becomes a yellow icon and the signature bar above the document becomes red and says that the document contains an invalid signature.
With "when removing the 1st or the 2nd one the invalid 3rd one becomes the 2nd one and turns valid." I mean that removing the 1st or the 2nd signature causes the 3rd signature to become the 2nd one (3-1=2) and then it becomes valid again: no yellow icon and the signature bar becomes blue.
So for the 3rd signature it seems the postion makes it invalid not it's actual content.
I do hope I added the information you needed. Please ask if you have any more questions.
*** This bug has been marked as a duplicate of bug 109371 ***