I just purchased an HP-9G. I found one bug initially and phone it into HP this week. Customer representative said that HP would send me a new unit. Friday night, I found another bug and e-mailed the information to HP with the associated case id.
The first bug is:
ln(2+2*10^(-9)) - ln(2) returns a negative number;
The second bug is:
7/6 [F<>D] [ENTER] does not convert decimal to the fraction, "7/6" where [F<>D] refers to the
fraction-to-decimal decimal-to-fraction shifted toggle key.
The first bug existed in early models of the HP-30S, but it had been fixed a long time ago. The second bug does not exist on the HP-30S.
HP's customer service response was excellent, once I got past the detour to an HP service center somewhere in India that apparently handled HP Pavilion computer models.
A side note:
So how did I know I had travelled to India? ... the accent was the first clue, but when you're put on hold and the rock music is accompanied by a sitar, you know you aren't in Kansas anymore.