I use Lazarus 1.4.2 mainly on Windows.
Although in IDE Options "Tabs to spaces" is set, and "Auto indent" is set to Spaces, I find the IDE is sometimes inserting tab characters rather than spaces.
I discovered this because formatting is at times completely messed up, and turning on "Show special characters" reveals sequences of tabs at the beginning of (seemingly random) lines where I expected to find spaces.
Also, even though "Tab widths" is set to 1, the IDE is inserting 5 spaces when I press the Tab key.
Could this be down to some unrecognised misconfiguration or corruption of configuration files, or has a bug/regression recently been introduced?