Hi guys,

I recently upgrade sage from 3.2.3 to 3.3. I'm also have sage 3.1.1
The thing is that the following commands give different results:

F.<theta>=FiniteField(9)
A.<t> = PolynomialRing(F)
K.<t> = FractionField(A)
f= 2/(t^2+2*t); g =t^9/(t^18 + t^10 + t^2);f+g

In 3.1.1 gives the right answer (I guess) but in 3.2.3 give an error:

ZeroDivisionError                         Traceback (most recent call
last)
...
ZeroDivisionError: division by zero in finite field.

I don't know how those commands work in 3.2.3.

I had a problem with sage 3.2.3, but Craig Citro helped me. Sage 3.2.3
couldn't open objects created in sage 3.1.1. This objects contain
polynomials p(T) in F_q(t)[T]. Perhaps these problems are related.

Any idea of how to fix that?

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