Version:           SVN trunk (using KDE 4.4.4) 
OS:                Linux

In a new account, I wanted to enter the first transaction.  Because the date I wished to enter was last year, I double clicked the date to select it.  When I tried to enter numeric values, they were not accepted.  I then cleared the field and attempted to enter the day value, but the active date field was the year, when I was expecting to enter the day first.  The year field would accept only digits 0 to 7, and 't', although I did not try some non-alpha keys.
Attempting to backspace to the date field, I could only backspace within the year field, not from there to the month/day.  The cursor keys worked though.
Having entered the above description and returning to KMM, now, having cleared the date, entering a zero does now go to the day field, and on going back again, it goes to the year field again.  I'll stop now.

Reproducible: Sometimes

Steps to Reproduce:
as above

Actual Results:  
as above

Expected Results:  
When the date field has been double clicked and is showing as selected/highlighted, it should accept logical numeric input consistently.

As to which date sub-field is initially active,perhaps that should be governed by the locale.

Ideally, other separators should be acceptable, not just the '.' I find.

I have a faint recollection of reporting something similar previously, but nothing showed up on searching.