[LBo] warning when unzipping files

[Emen Zhao]

Hello,

When I unzip a zip file on my Red Hat Linux box as below, it throws out a
warning, but the unzip is successful. Does anyone have a clue what causes
the warning. The zip file was zipped on a windows box using WinZip. I have
googled the question, but don't find anything useful. Thanks in advance for
any input.

$ unzip 1.zip
Archive:  1.zip
warning [1.zip]:  455 extra bytes at beginning or within zipfile
  (attempting to process anyway)
 extracting: 1.txt

Thanks,
Emen