- do you recall if with selecting the option "Download a new copy of the data ..." the installer was able to load the Web Media Block at the end?
- do you recall if you executed the package over an existing installation or the existing installation was first un-installed before to execute the update?
1) The files were all local (build all). Not sure if the engine will download a fresh copy when clicking for a fresh copy, but I tried that with the files in a valid web location and later a dummy (invalid) location to force it to use local only. It made no difference.
2) I tried both ways, upgrading an older version. Removing all older versions and attempting again. Again, no difference.
Here is how I came to this workaround.
I noticed that the same web block was extracted twice, second time it complains about the extraction error. I renamed the feature which renamed the web block in question, and it worked. I changed the feature name back for display purposes and it still worked.
I suspect having two web modules where a second one has the same name with a space in it caused the issue, but I'm sure your devs can debug that. I don't know why this worked (I'll leave that for you), all I care about is that it works now.
BTW. I took this over from Pierre.