how to find out ubuntu package upgrade history

Hi there,

recently I have severe problem with my open office package, by running it under console, I found a message like

glibc: catched error free() invalid pointer...
glibc: double free...

(I don't remember exact message. )

The above error occurs when I try to start Impress (but not Writer or SpreadSheed), also while I try to print inside OOo. But I have tried to completely re-install OOo, and this bug still exists, I think it is not a bug of OOo itself.

I have already reported a bug, for now, I am not asking question about this bug, but from the back trace, I guess the problem may be caused by a specific package. Because open office was fine from the day I installed gutsy, I now suspect this problem is caused by a bug in a certain package after an auto update.

Now my question is: how do I find out upgrade history of ubuntu, and selectively rollback certain packages, until I find out which update caused this problem?

Thanks,
Shannon