Installation problem in Lisa:
After resizing with gparted, mounting linux partitions stalled (mounting ...). It has happened in three systems with Mint Debian LMDE 9.0 (Toshiba portege r200, Asus eeepc, Dell GX-260)
All fine with Petra,
Upgrade from Rosa 17.3 to Sarah 18.0 without issues.
Beware you need 2,5-3 GB of empty space on your root ('/')