interesting issue with folder icons. i use them on the folder i put DDP's into and .wav references on client's FDDs. i don't use the icon on the ddp that i've zipped.
i did have an issue with the mac-pc issue. the artist name had an asterisk (*) in their name. mac handles that fine, but pc not so much. so the folder name of the artist inside the zip file created an illegal file on pc. it took forever and then eventually failed. unzips fine on mac. so i removed the special character and re-zipped them and they worked fine on the PC.
for reference PC (NTFS) illegal characters are:
/ ? < > \ : * | " and any character you can type with the Ctrl key
FAT also adds ^ to the above
MAC OSX only illegal character for folders and files is the colon (
(edited some funky formatting out)