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Yes, that is true.Also, I have reset reputation. It was off the charts, so changes became invisible. It should now work better.
That's normal. Reputation drops if you do nothing to gain more.*Changes* were invisible, because for some bug reputation had jumped into the thousands, and there you don't see +5 or +10. :-)
Everyones reputation is dropping all the time, and it drops by percent (I think 2% per turn). But it was up in the hundreds and thousands, and the good you did added +8 or +10 so it was invisible.Reputation should be much better now.