Probably a newbie issue. Downloaded latest Raspbian (2017-01-11). Last Install README said "unzip to card". OK, 15GB card - check. Kubuntu's Partition Manger Formatted fat32 - check. Unzip with ark, no containing folder - check.
Fail to boot. Unzip to folder, copy (.img - ?) to card -no, that's not right. Startup Disk Creator writes .img files,so ...
No boot. Back to Command-line:
~...$ sudo dd bs=4M if=2017-01-11-raspbian-jessie.img of=/dev/sdb
1042+1 records in
1042+1 records out
4371513344 bytes (4.4 GB, 4.1 GiB) copied, 320.641 s, 13.6 MB/s
SUCCESS!
May need better README? YMMV