1. New Calc document. 2. Select the two ranges B2:B4 and D2:D4 3. Create a conditional formatting on these ranges. 4. Open CF manager. 5. Double click the formatting (opens Edit dialog). 6. Change the target ranges from "B2:B4;D2:D4" to e.g. "B2:B4;D2:D400" 7. Click OK => nothing happens.
Hmmmm tried again with freshly started LO, cannot reproduce anymore. Tried a few times, with multiple sheets, seems to work now. Closing. Sorry for the noise.