[Tilesathome] Windows client will not upload

[Maarten Deen]

I've installed T at H in windows and I seem to have problems while uploading.
Rendering works fine (tile looks OK, there is a proper captionless tile but no 
normal tile, probably because there are no captions) but I get this message when 
uploading:

C:\ProgramFiles\TilesAtHome\tilesAtHome>perl tilesgen.pl upload
- Using working directory C:\temp\TaH
This is version 10049 (Rapperswil) of tilesgen running on MSWin32, ID: 58045
- Using working directory C:\temp\TaH
[#0   0% zipping] captionless_12_1251_2719.dir compressed by different process.
[#0   0% zipping] captionless_12_2719_1251.dir compressed by different process.
[#0   0% zipping] captionless_12_2880_1161.dir compressed by different process.
[#0   0% zipping] tile_12_1251_2719.dir compressed by different process. skippin
[#0   0% zipping] tile_12_2719_1251.dir compressed by different process. skippin
[#0   0% zipping] tile_12_2880_1161.dir compressed by different process. skippin
[#0   0% zipping] maplint_12_1251_2719.dir compressed by different process. skip
[#0   0% zipping] maplint_12_2719_1251.dir compressed by different process. skip
[#0   0% zipping] maplint_12_2880_1161.dir compressed by different process. skip
[#0   0% zipping] done

- Using working directory C:\temp\TaH

What is this message "compressed by different process. skipping"?

Maarten