"Steps to reproduce:
1. download ftp://svr-ftp.eng.cam.ac.uk/pub/misc/love_C.ps.Z
2. open in file-roller
3. check the file size

Expected result:
    The actual file is about 320k.

Actual result:
    Displayed as about 17,000,000,000 GB

This seems to be a simple display problem, the file still extracts fine.
I am using 2.20.1-0ubuntu1 on gutsy."

"man gunzip says :

The uncompressed size is given as -1 for files not in gzip format, such as compressed .Z files. To get the uncompressed size for such a file, you can use:
                  zcat file.Z | wc -c

as the .Z files in in compressed format (using compress command), it is normal that gunzip -l reports -1 as uncompressed size

the reported size by fileroller of 17179869184 GB is = 2^34 GB or 2^64 bytes, so maybe the -1 is translated to an unsigned max value in fileroller ?

It would probably be better to report "unknown" in stead of an incorrect number?"

http://launchpadlibrarian.net/10552010/Screenshot-love_C.ps.Z%20.png