Linux Mint 15 RC problems

Installed Linux Mint 15 RC on Virtual Box 4.2.12 on Windows Host.

Problems include:

1. Mint system hung after install / reboot when update was running. Recovery required CTRL/ALT/DEL to get back to windows. Cursor still moved, but system did not respond. Reset required to bring back Virtual Machine.
2. Comix cursors did not show correct transparency. Dark gray box was around cursor at all times.

Log files from Virtual Box are here:

LinuxMint15RC_Bugs