The trivial patch is available on github for your convenience.

This may be a bug in the archive.inc code that handles the unpacking of the tar archive.  In version 2.3.x around line 327 of archive.inc the prefix and name are not decoded after the unpack.

Putting an rtrim around the prefix and name fixes this issue.

i.e.

'name' => rtrim($temp['prefix']) . rtrim($temp['name']),

After making this mod it worked on WAMP.