I installed ownCloud 5 on a "dedicated server" (a colocated Raspberry Pi running Raspbian) earlier today and I've just upgraded it to ownCloud version 6. It seems to work reasonably well after certain adjustments to the server's configuration.

If you're running ownCloud with nginx and php5-fpm on a low-performance host (not necessarily a Raspberry Pi but perhaps a cheap VPS) and keep getting "gateway timeout" errors when the desktop client uploads large files despite the relevant adjustments to php.ini [1] try to set

    fastcgi_read_timeout 600;

for ownCloud's php files' location in the nginx site configuration file (e.g., /etc/nginx/sites-enabled/default). That resolved the problem for me. The timeout errors notwithstanding, the files that I tried (up to approx. 600 MB in size each) still got uploaded to the server and their checksums matched when redownloaded.

Overall, it seems quite usable with the client; however, the web UI is painfully slow much of the time when hosted on the Pi.

Has anyone here used ownCloud "in production", which is to say, as a full-time replacement for Dropbox? Have you had any hiccups with synchronization?

[1] See, e.g., the first post at http://forum.owncloud.org/viewtopic.php?f=23&t=9440.