Description:
If you have a conditional formatting in Calc (in my case conditional formatting->Icon Set->3 arrows) when saving in LibreOffice 24.8.x and then open it will be gone. This didn't happen in any of LibreOffice 24.4.x, conditional formatting was preserved after saving and opening.

Interestingly enough, open the file saved with LibreOffice 24.8.1 and then open it in LibreOffice 24.4.6, the conditional formatting shows as should be. 

Steps to Reproduce:
1. Make conditional formatting (example conditional formatting->Icon Set->3 arrows) 
2. Save file
3. Open the file in Calc 24.8.x, conditional formatting won't show
4. open the file in Calc 24.4.x, conditional formatting will show as expected

Actual Results:
Conditional formatting won't show

Expected Results:
Conditional formatting should show as applied


Reproducible: Always


User Profile Reset: No

Additional Info:
I have tested on Linux and Windows, it show the same issue. Opening a file with conditional formatting in Calc 24.4.x which was previously saved  in Calc 24.8.x  shows the conditional formatting as expected.

This imply that the loading files with conditional formatting in Calc 24.8.x are not processed correctly in Calc 24.8.x.

In my case when conditional formatting->Icon Set->3 arrows is applied, after opening the file in Calc 24.8.x. sets conditions to = instead of <, = and >. If you correct it, it will show as it should, but after saving and opening again, it is is not shown.