Following installation, the existing Liberation Sans 6pt font utilised in a sheet was changed to Liberation Serif. It appears the spacing or column width has also been affected as it was necessary to re-adjust some column widths where text overflow occurred. My simple sheet only had 200+ lines and 25 columns with a few charts so the impact was not critical. I imagine (not tested in any way) a more complex sheet with multiple styles and possible embedding would require significant effort to repair.
Looks a bit like bug 98190
Maybe default template was modified, for me a new spreadsheet with 5.0.5.2 has Liberation Sans for default style. Or a modification in Menu/Tools/Options/LibreOffice/Fonts - Replacement table.
Colin: what do you think about comment 2? Set to NEEDINFO. Change back to UNCONFIRMED after you have replied.
I can confirm that my Libre Calc default font is Liberation Sans 10pt. The current sheet font size has been manually changed to 6pt. As a consequence of the irregularities I also changed the font in that sheet to Arial which then gave me a more consistent representation with which I could modify column widths etc to obviate all the inconsistencies. When the change is implemented I simply select the entire sheet and make it 6pt. I use the present tense because every week I import a line of data from a web site and again select and set the entire sheet to ARIAL 6pt. The line of data being copied contains a link to further on-site analysis and that link remains active within my sheet. I provide herewith the URL I use for the line of data. https://www.euro-jackpot.net/archive My procedure is simply to highlight the latest line of data and copy/paste it to my sheet. This gives me the direct link to the target date field (ctrl + left click) and the seven numbers in a text field. I then set the font and size preferences and process the extracted data further. I have briefly examined prior sheets of a similar nature and they now appear to load into the system correctly. It is possible that the initial error was a one-time update glitch.
Ok, sounds like this can be closed. Colin: in the future, you could modify the default style of your document (sidebar - styles). Also, always paste as unformatted text. Then the formatting will go according to your style definition.