Hi, (Esteban), I'm trying to upload couple .mcz to Smalltalk hub using following script: ==== for f in $(cd mc && ls *.mcz); do echo -n "Uploading $f..." curl --user JanVrany:<my password here> --upload-file mc/$f http://smalltalkhub.com/mc/JanVrany/CalipeL-S/main/$f; echo done === and I'm getting following output: === Uploading CalipeL-S-Benchmarks-Game-JanVrany.ee1fd4a6e836.20150420125300.mcz...receiver of "asTimeStamp" is nil Uploading CalipeL-S-Benchmarks-Micro-JanVrany.ee1fd4a6e836.20150420125300.mcz...receiver of "asTimeStamp" is nil Uploading CalipeL-S-Core-JanVrany.ee1fd4a6e836.20150420125300.mcz...receiver of "asTimeStamp" is nil Uploading CalipeL-S-Tests-JanVrany.ee1fd4a6e836.20150420125300.mcz...receiver of "asTimeStamp" is nil === The .mcz load into Pharo image just fine. The last time I did this was Dec 2014 and it worked like a charm. Is it a bug? If not, how can I upload a new .mcz to SmalltalkHub? I can provide .mczs for debugging. Best, Jan