Problems decompressing kdevelop archive files

[obscurity]

OK, I'm probably doing something really stupid.  It wouldn't be the first
time.  I'm trying to download & install kdevelop (either version 1.3 or the
1.4 daily snapshots - I've got KDE2 installed, so I want something that will
work with that).

Unfortunately, none of the archive files I've downloaded seem to want to
uncompress. 

I'm sure the files have been fully downloaded (ie, not truncated) and have
been ftp'd as binary rather than ascii, as ls -l gives me the correct file
size.

Here's an example of an attempt with a .bz2 file:

--------------------included text start---------------------
[obs at burnout obs]$ ls -l kdevelop-1.3-linux-i386.tar.bz2
-rw-r--r--   1 obs      obs       7600426 Dec 10 20:29
kdevelop-1.3-linux-i386.tar.bz2
[obs at burnout obs]$ bzip2 -d kdevelop-1.3-linux-i386.tar.bz2

bzip2: Data integrity error when decompressing.
        Input file = kdevelop-1.3-linux-i386.tar.bz2, output file =
kdevelop-1.3-linux-i386.tar

It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.

You can use the bzip2recover' program to *attempt* to recover
data from undamaged sections of corrupted files.

bzip2: Deleting output file kdevelop-1.3-linux-i386.tar, if it exists.
[obs at burnout obs]$ bzip2 -tvv kdevelop-1.3-linux-i386.tar.bz2
  kdevelop-1.3-linux-i386.tar.bz2:
    [1: huff+mtf rt+rld]
    [2: huff+mtf rt+rld]
    [3: huff+mtf rt+rld]
kdevelop-1.3-linux-i386.tar.bz2: data integrity (CRC) error in data

You can use the bzip2recover' program to *attempt* to recover
data from undamaged sections of corrupted files.
--------------------included text end-----------------------

...and here's a .gz attempt:

--------------------included text start---------------------
[obs at burnout obs]$ ls -l kdevelop20010116.tar.gz
-rw-r--r--   1 obs      obs       1826204 Jan 16 01:55 kdevelop20010116.tar.gz
[obs at burnout obs]$ gzip -d kdevelop20010116.tar.gz

gzip: kdevelop20010116.tar.gz: invalid compressed data--format violated
--------------------included text end-----------------------

I'm using version 1.2.4 of gzip, and 0.9.0b of bzip2, if that's relevant.

I've tried this one 2 different machines, with the same problem.  I find it
hard to believe that the files on the ftp server (downloaded directly from
ftp.kdevelop.org, btw) are corrupted, because surely someone else would have
noticed by now.  I'm convinced the problem is with me, somehow, but I have
no idea what the problem is - I've never really had any problems with with
ungzipping/unbzip2ing files in the past...

Any ideas, anyone?  Failing that, anyone wanna give me a plain tar file ? :)

-- 
obscurity.

"Only the great masters of style ever succeed in being obscure." - Oscar Wilde

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