When compiled with Qt5, some keyboard shortcuts don't work anymore (with a German keyboard layout). Examples:
Ctrl+/ for "UnCommentSelection" (actually Ctrl+Shift+7 with a German layout)
Alt+( for "StartMacro" (Alt+Shift+8 with German layout)
The problem seems to occur when a character in a shortcut is entered with more than one keyboard key (e.g. the "/" is "Shift+7" in the German layout). Entering the shortcuts in the options works fine, and gives "Ctrl+/" when pressing "Ctrl+Shift+7".
This bug does not occur when compiled with Qt4 (tested with Qt 4.8.4).