Why are the words I add to the dictionary (during spell-check) lost upon restarting LO?

When I right click on a spell check underlined word and click Add all other instances of that word in the document are now recognized as correct. Great. But when I close LibreOffice and reopen it no longer remembers the words I added to the dictionary. I can not seem to permanently add to the dictionary. I am sure it is an easy solution, but I can not seem to find the answer. Thanks.

Linux Mint 15

Probably Bug 60833 - EDITING: Terms added to dictionary are lost between editing sessions

Status: RESOLVED FIXED (LibreOffice 4.2.3 / 4.1.6).

See also duplicate Bug 60870 - EDITING: Spell Check custom dictionary not recognized?

I’m sorry to say that I’m also currently experiencing this problem. Corrected words, or words added to dictionary are not saved between sessions. Can anyone here please advise?

SolydX EE Debian Testing - LibreOffice Version: - Build ID: e5f16313668ac592c1bfb310f4390624e3dbfb75
Locale: en-GB (en_GB.utf8)