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Description of problem:
Once a keyring is modified by gnupg 1.0.7, versions of gpg included with earlier
distros can no longer read it. When attempting a --list-keys on a 1.0.7
maintained pubring with an older version of gnupg, packet errors are generated.
See below for more. 

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. modify an exisintg public keyring from psyche
2. attempt to list keys in that keyring on valhalla (7.3)
3. See the following error :
gpg: [don't know]: invalid packet (ctb=03)
gpg: read_keyblock: read error: invalid packet
gpg: enum_keyblocks(read) failed: invalid keyring


Actual Results:  This error happens on all available prior versions of GPG I
have to test - 1.0.6-0.6.x (from RHL 6.2) and 1.0.6-5 (from RHL 7.3). 

Expected Results:  I should see a list of keys, and I don't. 

Additional info:

Backporting 1.0.7 (from psyche) to 6.2 and 7.3 fixed the errors. in order to
compile on 6.x, LDAP had to be disabled in the .spec file.