There is a known issue. If I remember correctly you can't enter fractional weights when using metric units (or something like that). If you are using Statute units and a language that uses a period as the decimal point, it seems to work fine.
I am in French Language and using metrics unit so I can only enter fractional weights with "," but it say me "bad request when I click on OK. Even if I switch to English it stay the same, and this appears only since 1 week. What would be a solution ?
There is no solution that I know of at this time. The only workaround that I can think of would be to change your Measurement Units to Statute temporarily, add a weight measurement, and then change it back.
