1) probably something wrong on your side, I do not see any problem in several browser now.
There is only possible some race condition (very rare, and I hope I already fixed this), try again with some delay (20-30 sec) again.
I tried again, several times.
What happens is always the same : I put a larger amount in the "minimum payout" field, then click "update" button. At this point, the screen goes entirely blank. I need to go back once in browser history to get back to the previous page ( profile ). At this point the larger amount is still here, but the "update" button is not responsive any more. If I go to the main home or news page, then back to my profile, the minimum amount it reset to 1.00.
2) 3.6.17 you mean? If not, try update your browser.
This is 3.6.17 indeed, under linux. I will try to update to 4, and tell you if it changes.