do_plaintext() error message

[Hunter, Bryan]

Could some one please explain what the following error message means and in
particular whether the output is corrupt in some way?

gpg: do_plaintext(): wrote 46305280 bytes but expected 4096 bytes

This was the result of entering a command like this.

time tar -cvf - directory | gpg --output outfile --encrypt --recipient keyid
-

Here "directory" is a directory, "outfile" is the output file, and "keyid"
is the recipient.  This is GnuPG 1.0.6 running under RedHat 7.2.  A
decryption by PGP seemed to work.

Thank you,
Bryan Hunter