We have two interesting issues since Intrepid Ibex was released. My updates were tied to the development version but I believe these were observed after the release was final:
MythTV playback sound is higher-pitched in almost every case whether recorded months ago or hours ago. So does live TV.
Lirc was failing to run because it did not see the right lirc device. A soft link in /dev fixed that.
Unrelated to Ubuntu, our remote that came with the multimedia PC case is very flaky with the left and down directions on the keypad. It allows far more than the four compass points. It is possible to recognize the other remote signals but tricky to get the right responsiveness - recognizing all of them produces far too many key presses.