problem invalid packet

[piotrl2@attbi.com]

I have problem with encrypting a file.
I'm using gpg (GnuPG) 1.0.6 on Windows NT 4.0 SP6
I encrypted rather large tarball (~30MB) using just
symmetric cripher (gpg -c)

When I'm trying to decrypt, gpg is complaing about
invalid packet and zlib inflate problem.
See below for the full error message(s).

Does it mean that the file is corrupted ?

Unfortunatly I do not have access to the original,
so I'm not 100% sure that this is not a problem with
transmission over the net...

thanks, ~piotr

C:\>gpg -o yb.tar --decrypt yb.gpg
gpg: [don't know]: invalid packet (ctb=02)
gpg: packet(14) with unknown version 212
gpg: fatal: zlib inflate problem: unknown compression 
method
secmem usage: 2016/2176 bytes in 4/5 blocks of pool 
2176/16384

Here is output when run with -vv
C:\>gpg -vv -o yb.tar --decrypt a.gpg
:symkey enc packet: version 4, cipher 3, s2k 3, hash 2
        salt 1e9bffd7c7e52679, count 96

gpg: loaded digest 2
:encrypted data packet:
        length: unknown
gpg: CAST5 encrypted data
:compressed packet: algo=2
:literal data packet:
        mode b, created 1009567514, name="yb.tar",
        raw data: 0 bytes
gpg: original file name='yb.tar'
gpg: loaded digest 3
gpg: loaded digest 1
gpg: [don't know]: invalid packet (ctb=02)
:unknown packet: type 15, length 80
dump: 9d 0f 5b 41 0b ff 84 19  2d 2f 83 21 1d cf 10 85  
20 f0 c4 5a b0 96 4f 20
  24: 2a 9c c8 d7 06 3f 44 e0  f3 5e aa e7 f0 c4 da e7  
90 a2 71 16 db 27 63 02
  48: bc 50 05 16 19 32 83 b4  34 74 cd 3c cd 27 c5 89  
79 e8 cc 6b 3a 84 23 07
  72: 35 dc 1e 2f 41 fa b5 1c
gpg: packet(14) with unknown version 212
gpg: fatal: zlib inflate problem: unknown compression 
method
secmem usage: 2016/2176 bytes in 4/5 blocks of pool 
2176/16384