Being I'm Diesel Truck Site I've been known to work on some of my members truck I would love to be able to invoice them for the work I'm doing for there truck on the site. The problem is there is no way to do fractional quantity. So say I charge $60 a hour for labor and need to do a valve lash adjustment and got to charge them for 1.5 hours. Commerce Module dumps the fractional value from the invoice. Say I got to sell them a 1/2 gallon of oil to top off a crankcase oil? Again Commerce drops the decimal. I'm sure there is an easy way to resolve this for the programmers here... 

I second this. Would be very useful to have the system not drop off decimals, for better flexibility such as in cases like this. And like you mentioned, should be simple programming modification.

Here is a previous thread I started asking about this before...