Using LO 4.2.5.2 on elementary OS (Ubuntu 12.04, Swedish language) and tried the following formula from within Writer:
[hat %beta%_1 = bar Y - hat %beta%_2 bar X]
and the “line over”-function (represented by “bar Y/X”) only gives a square back above the letter instead of a bar.
Other functions seems to be working fine. Have tried a few different fonts but no luck. Any ideas?