Another LTS step version has been released, upgrading AMD64, i386 and PowerPC systems. Lubuntu 14.04.4 fixes lots of bugs fixes and improvements, specially within the kernel:

Refresh hardware support in LTS releases for carefully-selected hardware

Roll up accumulated stable updates into updated images to reduce download requirements for new deployments

Maintain stability of existing installations

Various bugs that required updates are rolled into this update.

You can grab the new ISOs in the Downloads section. More details on the (several) changes can be found here. Don’t forget to read the Release Notes. More images here.