Please describe the problem:
I went to reconcile a bank statement under Windows GnuCash 2.2.6. I found that I could not change the statement date in the reconcile window to any date other than the current date. The date picker is unresponsive, and if I type a different date, it replaces the typed date with the current date.

Steps to reproduce:
1. Reconcile a statement.
2. The statement date (today, on 3 Aug 2008) defaults to 1 Aug 2008. 
3. Attempt to change it. The date picker will be unresponsive and if you type a different date it replaces it with the current date (3 Aug 2008, in my case).


Actual results:
The date cannot be changed.

Expected results:
The date should be changed.

Does this happen every time?
Yes, under 2.2.6.

Other information:
Windows Vista x64, using (x86) GnuCash 2.2.6. This did not occur under 2.2.5.