"Edit exchange rate" has stopped working (2.2.9)

[Adam Funk]

On 2010-02-01, AmigaPhil wrote:

> Hello Adam
>
> On 01/02/10, you wrote:
>
>> Furthermore, I can't set the correct current exchange rate on the cash
>> purchases in the Cash EUR account either; they are all "locked" on the
>> old rate.
>
> I think I had about the same problem once.
>
> Open the price editor and check in EUR and GBP for a price that has
> been added automatically for the transaction date.  Remove it. 
> Close the price editor and go back to the account.  Right-click on
> the transaction again and you should be able to change the exchange
> rate.

I opened the price editor, deleted all the entries for EUR in January
2010 (they all had source "user:xfer-dialog"), and closed the price
editor.  Then I tried edited the exchange rate in the EUR100 =
GBP89.36 withdrawal again ("to amount" 100); that created an entry in
the price editor

 EUR  GBP  20/01/20  user:xfer-dialog  0.893600

but the amount in the Cash EUR account *still* shows 96.48 instead of
100!  I'm baffled.