Problem description: Then  

Steps to reproduce:
1. Open a spreadsheet, type a few numbers and create a chart with them. 
2. Create and add a personalized text object in the chart, e.g. a description or any other comment you want to show somewhere in the chart and is not an automatic chart object like title or axis label. Alternatively, insert a graphic object like a rectangle.
3. Save the file and reopen it: the text or other object object is lost, and there seems to be no way to recover it.

Current behavior: This happens also when you open a file created with a previous version: I had a paper with 50 charts inserted, edited with no problem until 4.1.5, all with description inserted as text objects, now I open it with 4.2.2.1 and ALL of them are lost. All charts are shown, but none of them has the inserted text objects anymore.
Expected behavior: All objects inserted in a chart to personalize it should be saved as before.
To avoid MASSIVE DATA LOSS I now cannot edit the file anymore.

              
Operating System: Windows 7
Version: 4.2.2.1 release
Last worked in: 4.1.5.3 release