Ozcoin does NOT have Fixed Difficulty. You can set the low end to whatever you want with the user defined difficulty. But Ozco has it's own thresholds so it will raise it for a certain number of shares per a time period.
Thank you very much os2sam, now I understand why it changes over time.
However, I think that the Ozcoin web interface should be a bit clearer, right now the only piece of information about how VarDiff is used are the following lines (from the edit worker page):
Enter your Variable Difficulty for this worker here -1 = Dynamic, 1-10000 = User defined difficulty. Will change your difficulty without need of miner restart now. (Stratum only) Setting lower than -1 may cause 0 payouts, please be sensible.
It seems a bit misleading to me.
On another note, since about 12:40 UTC the pool's web interface seems frozen: I noticed that the round shares number doesn't increment and I have no hourly stats anymore. The pool is still accepting shares, though. What's going on?
