Change in number field causing problems...

I recently updated to shop 1.2.5 and runway 3.0.10 and there seems to be a change in the number field that is causing me problems...

I have the weights set for products in the shop. Those fields are number fields. The weights are decimal values as I'm sending a series of tickets (0.5).

After the update, when I try to make a change to a product through the admin and I can't save the record because perch is alerting me to "enter a valid value" into the shipping weight field.

Any way the functionality of that field can be returned to what it was previously (supporting decimals)?