During installation of Qt 5.0 SDK for linux 64b (releases.qt-project.org/qt5.0/rc1/qt-linux-opensource-5.0.0-rc1-x86_64-offline.run), downloaded yesterday, message "insufficient space" shows up, though there is more than enough disk space to install Qt in given directory.
The problem is, installer checks only "/" partition, apart from real install directory. In my situation install dir was /home which had enough space, but "/" didn't. After freeing up space on "/" volume, installation (to "/home") can move forward.
It can be related to