Testcase for the problem, which i described in my bug report.

gistfile1.erl

-module (problem).

-include_lib("eunit/include/eunit.hrl").
-ifdef(TEST).

the_problem_test() ->
  {ok, File} = file:read_file("../data/global.pem"),
	[Cert] = public_key:pem_decode(File),	
	{_, C, _ } = Cert,
	A = public_key:pkix_decode_cert(C, otp),
	{error, issuer_not_found} = pubkey_cert:issuer_id(A, other).
-endif.	

gistfile2.txt

-----BEGIN CERTIFICATE-----
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TpnKXKBuervdo5AaRTPvvz7SBMS24CqFZUE+ENQ=
-----END CERTIFICATE-----