Actually all supported exchanges have trouble with rounding because decimal count of price is different vs amount decimal count.
It makes trouble when you going to buy on all funds.
I made many tests to make it works by limit 100% amount calculations.
Looks like Bitstamp made changes and we need to recalculate maximum % for different amounts.
If you have a time please test it with 99% and 99.999% and try to get maximum working percentage and tell me, than I'll fix it faster.
hi Ighor, yes this was my idea with 99,99% or 99%, too...i have tested it with 100% and the 100% worked well in my tests. Strange. Every time when i was NOT sitting infront of my notebook 100% didn't work and i got fucked.. 2 times now.
i will leave qt running with 99,99% and will give you a feedback again.