Just a FYI,
The TdateEdit control from the misc tab on the pallet raises a exception when you click on it and the form is maximized.
The exception actually terminates the app.
To duplicate just drop a tdateedit on on a form, then run, maximise the form and click the tdateedit.
Project project1 raised exception class 'External: SIGABRT'.
Using Lazarus 1.2.4 on 64bit Linux Mint 17 KDE. Lazarus and FPC installed from the official .debs.