I'm not sure if this helps but this does not compile for me on Ubuntu 11.04 on a small 32-bit EC2 instance, AMI ami-06ad526f, but it DOES compile for me on Ubuntu 11.04 on a micro 64-bit EC2 instance, AMI ami-06ad526f. 0.23 compiles on the small 32-bit.
I'm not sure if this helps but this does not compile for me on Ubuntu 11.04 on a small 32-bit EC2 instance, AMI ami-06ad526f, but it DOES compile for me on Ubuntu 11.04 on a micro 64-bit EC2 instance, AMI ami-06ad526f. 0.23 compiles on the small 32-bit.