FS#6377 - a bug in path handling of tar files
The path handling of tar files seems not to be working.
When two of the same Newgrf's are in the same dir IE ogfx-airports.tar and ogfx-airports-v5748-80.tar, OpenTTD only sees ogfx-airports.tar and any game that is started with ogfx-airports-v5748-80.tar will "update" to ogfx-airports.tar. Unpacking the files into their own Directory "solves" this problem but isn't ideal.
Thread where it was "first" discussed, http://www.tt-forums.net/viewtopic.php?p=1150933#p1150933
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