Under "Ubuntu One" in my home directory (using 11.04) I have a directory "daily" and under that 7 more directories whose names are the days of the week. A daily cron job gathers a few important files and puts them in the proper subdirectory so that I have backups for the most recent 7 days. Works fine. When I log on to one.ubuntu.com/files, all the directories and most of the files are there, but the files under daily/Wednesday and daily/Thursday are missing.
I've tried waiting. Several days. The wednesday and thursday files that I can see locally does not get uploaded. I've tried disconnecting and reconnecting ubuntu one in the Ubuntu One control panel. Does not help. If I create an empty file under daily/Friday, it gets uploaded within seconds. Doing the same under daily/Wednesday has no effect. I've checked that the file and group owner and protection bits are the same for all files. File sizes are also similar for all directories. The total size of all files is less than 100Mb, so should fit within the 2GB limit.
What more can I try?