The 2.15.10 release is an unstable release of GDM with the following new features.

- Now gdmlogin centers cursor in the GUI to ensure that the login window always has focus. Fixes bug 327530.

- Translation updates (Subhransu Behera, Rahul Bhalerao, Wouter Bolsterlee, Maxim Dziumanenko, Artur Flinta, Leonid Kanter, Gabor Kelemen, Priit Laes, Ani Peter, Hendrik Richter, Satoru SATOH, Funda Wang

Note that this also contains an important security fix that was originally released in 2.15.4, so please make sure to update if using an older version than 2.15.4.