I think I found a small bug with this otherwise quite polished app.
The size of the Date rectangle seems to be static and most probably it's size is determined during start up according to the current string in the ini file. But that way if you start your phone lets say on Monday and the string is like "Monday 31 August 2011", eventually when you end up on "Saturday 10 September 2011" the string won't fit and is cut at both ends. This happens in both landscape and portrait modes.
Initially I thought that there is something wrong with the ini config file,
but after manual restart of qtlockscreen the problem was solved.

Does anyone else has experienced such behavior?