GnuCash math error?

I'm using GnuCash on Suse 9.3. Overall, I'm fairly satisfied with the program, but it seems to be messing up its math. When I enter a check, it ignores the second decimal place when it figures the balance. For example, if the previous balance was $1972.50 and I write a check for $30.42, the resulting balance is $1942.10. Anyone else encounter this? Any fixes? I'm also pursuing this problem with GnuCash.org. T. Daniel