Be wary of LibreOffice 3.6
If you're considering upgrading to LibreOffice 3.6, my advice -- at least for the present -- is DON'T. Or if you do, proceed with caution. (Instructions below.)
In the past, upgrades have been flawless, but I do still regularly backup my Profile folder. The wisdom of doing so was proved at the weekend when I upgraded from LO version 3.5 to 3.6. It all went swimmingly as usual, but when I can to use the new version I discovered some anomalies. Gone: 40+ macros I've built up over years of using OpenOffice.org and LibreOffice. Gone: some basic settings such as Page Format (A4 went back to Letter) and Measurement Units (Millimetres went back to Inches).
A quick net search found I wasn't alone.