Wrong filesize in .gz archives

[tom_ch]

I have some .gz archives, which are fully extracted - however, if I look at them in TC, there is always an incorrect filesize displayed.

e.g. Filesize .gz: 408'540
Filesize in TC when opening .gz-file with [Enter]: 109
extracted filesize: 3'145'604

Other sample:
- filesize .gz: 261'105
- Filesize in TC when opening .gz-file with [Enter]: 114
- extracted filesize: 1'710'019

I can provide screenshots if necessary. This happens at least on Win7 with PB8 and RC1.

[Postkutscher]

2tom_ch
Are you sure, that it was not renamed other archive type? Which utility has created these files? Could you please upload an example of such a file to rapidshare.de or other sharing service?

[ghisler(Author)]

TC shows what is stored in the .gz header. Some on the fly packers (e.g. via PHP) seem to write wrong values in this field.

[tom_ch]

Perfect explanation from Christian. In fact these are PHP-generated files.
A bit misleading, but okay if you know it...