12.12beta版本能否升级到rc版本？如果可以的话是否需要更改源？
出现如下错误是什么原因？
正在读取软件包列表... 完成
正在分析软件包的依赖关系树      
正在读取状态信息... 完成      
正在对升级进行计算... 完成
下列软件包将被【卸载】：   deepin-firefox-addons deepin-software-center-data libqt4-dev-bin
下列软件包的版本将保持不变：
  compiz
下列软件包将被升级：   deepin-desktop-environment-lightdm-greeter deepin-desktop-environment-lock deepin-gtk-theme deepin-icon-theme deepin-media-player deepin-music-player
  deepin-notifications deepin-screenshot deepin-software-center deepin-system-settings deepin-system-settings-module-a11y
  deepin-system-settings-module-account deepin-system-settings-module-all deepin-system-settings-module-application-associate
  deepin-system-settings-module-bluetooth deepin-system-settings-module-date-time deepin-system-settings-module-desktop
  deepin-system-settings-module-display deepin-system-settings-module-driver deepin-system-settings-module-individuation
  deepin-system-settings-module-keyboard deepin-system-settings-module-mount-media deepin-system-settings-module-mouse deepin-system-settings-module-network
  deepin-system-settings-module-power deepin-system-settings-module-printer deepin-system-settings-module-sound
  deepin-system-settings-module-system-information deepin-system-settings-module-touchpad deepin-system-settings-module-tray-power deepin-system-tray
  deepin-ui deepin-user-manual fcitx fcitx-bin fcitx-data fcitx-frontend-gtk2 fcitx-frontend-gtk3 fcitx-libs fcitx-module-dbus fcitx-module-kimpanel
  fcitx-module-x11 fcitx-modules fcitx-skin-sogou fcitx-sogoupinyin fcitx-table fcitx-table-wubi fcitx-ui-classic gnome-settings-daemon gnome-system-monitor
  gsettings-desktop-schemas libcompizconfig0 libdecoration0 libdeepin-webkit-3.0-0 libnautilus-extension1a libqt4-dbus libqt4-declarative libqt4-designer
  libqt4-help libqt4-network libqt4-opengl libqt4-qt3support libqt4-script libqt4-scripttools libqt4-sql libqt4-sql-mysql libqt4-svg libqt4-test libqt4-xml
  libqt4-xmlpatterns libqtcore4 libqtgui4 libx11-6 libx11-data libx11-dev libx11-doc libx11-xcb1 nautilus nautilus-data python-compizconfig
  python-deepin-pulseaudio python-deepin-storm python-deepin-utils python-deepin-xrandr python-pystorm qdbus qt4-linguist-tools qt4-qmake
升级了 107 个软件包，新安装了 3 个软件包，要卸载 6 个软件包，有 1 个软件包未被升级。
需要下载 53.1 MB/225 MB 的软件包。
解压缩后将会空出 1,068 kB 的空间。
您希望继续执行吗？[Y/n]y
错误 http://packages.linuxdeepin.com/deepin/ quantal/main libqt4-test i386 4:4.8.4+dfsg-0ubuntu9deepin1
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错误 http://packages.linuxdeepin.com/deepin/ quantal/main libqt4-designer i386 4:4.8.4+dfsg-0ubuntu9deepin1
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错误 http://packages.linuxdeepin.com/deepin/ quantal/non-free fcitx-sogoupinyin i386 0.0.4-1
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