After some investigation I can tell there are two certificates in this file that expired on sept. 23th. Another two will expire on oct. 23th and nov. 30th. I bet the two expired certs are causing the issue. I just have to nail them down. (There are 218 certs inside this file and I have to redefine my greps to regognize which of them are the expired ones.)
BTW: Thanks LL for not lettling me report this problem to you since I am a basic member and you are therfore not netting me open technical tickets anymore.
UPDATE:
Issuer: C=PL, O=TP Internet Sp. z ., OU=Centrum Certyfikacji Signet, CN=CC Signet - CA Klasa 1
Validity
Not Before: Oct 17 12:29:02 2003 GMT
Not After : Sep 23 11:18:17 2011 GMT
Subject: C=PL, O=TP Internet Sp. z ., OU=Centrum Certyfikacji Signet, CN=CC Signet - TSA Klasa 1
Issuer: C=PL, O=TP Internet Sp. z ., OU=Centrum Certyfikacji Signet, CN=CC Signet - RootCA
Validity
Not Before: Sep 23 14:18:17 2001 GMT
Not After : Sep 23 13:18:17 2011 GMT
Subject: C=PL, O=TP Internet Sp. z ., OU=Centrum Certyfikacji Signet, CN=CC Signet - CA Klasa 1
Issuer: C=AT, ST=Austria, L=Vienna, O=ARGE DATEN - Austrian Society for Data Protection, OU=A-CERT Certification Service, CN=A-CERT ADVANCED/emailAddress=info@a-cert.at
Validity
Not Before: Oct 23 14:14:14 2004 GMT
Not After : Oct 23 14:14:14 2011 GMT
Subject: C=AT, ST=Austria, L=Vienna, O=ARGE DATEN - Austrian Society for Data Protection, OU=A-CERT Certification Service, CN=A-CERT ADVANCED/emailAddress=info@a-cert.at
Issuer: C=BR, O=ICP-Brasil, OU=Instituto Nacional de Tecnologia da Informacao - ITI, L=Brasilia, ST=DF, CN=Autoridade Certificadora Raiz Brasileira
Validity
Not Before: Nov 30 12:58:00 2001 GMT
Not After : Nov 30 23:59:00 2011 GMT
Subject: C=BR, O=ICP-Brasil, OU=Instituto Nacional de Tecnologia da Informacao - ITI, L=Brasilia, ST=DF, CN=Autoridade Certificadora Raiz Brasileira