I noticed that decimals are no longer allowed when recording your weight manually. When using commas, I get a bad request message. When using dots, I get a invalid character message. This seems to be a bug.
It seems to work fine with Chrome on iOS and Safari on iOS (ignoring the rendering issue that causes the OK button to be misplaced). Note that I'm using Statute units, so I'm entering weights as pounds, which mat have some bearing on this. I do recall someone saying something about problems entering fractional weight as kilograms.