Hi,
Not thoroughly tested yet, but it seems that there's a problem when inserting/deleting a row above a row with conditional formatting or deleting a row that contains conditional formatting.
Version: 3.01.05.
Rough steps (untested):
1. Sheet with conditional formatting in one cell, formula based condition with a formula like "=isempty(C12)" where C12 is the cell itself.
2. Insert row before that formatted one.
3. The conditional formatting is lost.
At a later stage, such a row is deleted, and suddenly the conditional formatting seems to have been applied to the entire sheet.
Hopefully you can find the bug, if there is one, based on this. I'll post more details as soon as I can, hopefully with a tiny test project.
Kjell