ithis kernel requires the following features not present on the CPU:pae
unable to boot,please use a kernel appropriate for your CPU.

you can enable PAE from System > Processor settings

brief test of the latest android_4 .vdi:

boots smoothly via "add",
sdcard is mounted automatically,
mouse and pointer work perfectly,
installation of.apk from PC works in two ways:via push to sdcard, followed by adb shell; pm install /sdcard/apk.ap, and directly by adb install (on /data/local/tmp) work well.
Nice work!

Installation of .apk by direct download from internet does not yet work.
Test of file sharing still open.

yes, it's weird error, debugging it now.

Did you mention that you saw this error with other versions of Android?

volker_kempter wrote:

Installation of .apk by direct download from internet does not yet work.
Test of file sharing still open.

.apk, direct download: no such error with 2.2 and 2.3 x-86 ports.

test of share between vm and linux host:as recommended, I have created /mnt/sdcard/c_drive (even got the error mentioned by you).
How to access c_drive from the linux host? Did "sudo mount -t vboxsf share /media/": "unknown filesystem type vboxsf".
Any advice?

you do this: mount.vboxsf c /mnt/sdcard/c_drive

Also make sure to add a folder to the vm using Devices > Shared Folders... menu while vm is running.

the readme file has instructions.

should be able to fix that sdcard error next couple of days.