@HellSniper: MEF files are stored, not deflated. Nothing new there.
The problem is that after the itemicons in the interface folder have been extracted there is an entry "interface", which is treated as a file - and conflicts with the interface folder.
edit
Decrypted file header example:
Code:
22F:8A40h: 50 4B 03 04 14 00 00 00 00 00 03 A9 31 3E 00 00 PK.........©1>..
22F:8A50h: 00 00 00 00 00 00 00 00 00 00 04 00 00 00 6D 61 ..............ma
22F:8A60h: 70 73 50 4B 03 04 14 00 00 00 08 00 04 A9 31 3E psPK.........©1>
22F:8A70h: 63 7E 1D C0 04 2D 00 00 F0 55 00 00 19 00 00 00 c~.À.-..ðU......
22F:8A80h: 6D 6F 64 65 6C 2F 6D 61 6E 2F 63 72 6F 77 6E 5F model/man/crown_
22F:8A90h: 6D 2E 74 67 61 2E 64 64 73 m.tga.dds
The file record for "maps" which is 0 bytes long.
A quick fix can be not extracting files which are 0-bytes long.