retry installation of failed software updates
When installing updates via software centre, some updates may fail initially, once other updates have completed installation, software centre doesn't retry these updates but prompts for the reboot. Once the user reboots updates may try installation again which then means another reboot for the user. When initiating the install again manually it usually results in the failed updates installing correctly.
Software Cenre should retry the 'failed' updates at least once - before offering a reboot to the user as in most cases this should result in all updates being applied and the user only needing to reboot once.
Also better failure messages within Software Centre would be appriciated, i.e rather than just failed. is it because of 'low disk space' or 'another installation in progress' or 'download failed' etc