We saw at least a few issues with Google's promising Android 3.0 OS. We already told you that the delay to Q1 2011 was caused by serious (in)stability issues, and unfortunately, the build shown off in Barcelona still exposed some weaknesses.
We saw that LG had to reboot its devices from time to time, and they didn't mind us watching as HD movies would miraculously start to disobey. We saw that some 3D games won't start and in both cases Tegra 2 was involved.
We witnessed some instability and applications that refused to run even at ARM's booth. The shipping time for tablets with Android 3.0 is March so let's hope that these were old hardware meets old software build scenarios.