When starting Lazarus the first time after running the installer (setup.exe) from the daily builds (on Windows 8.1/64), there are hundreds (or so, didn't bother to keep count) of WMSize error message coming up. Cancel will cancel the start of the application (no surprise here) and when just holding down the mouse key on the [Ok] button to confirm all those errors, the program will eventually come up fine and also seems to work fine after that as well. Also, on subsequent starts, those error messages aren't coming up anymore either...
Don't have seen this when running the setup.sh script on Linux, so I think this might be another initialization issue similar to the faulty path name a couple of months ago...
Ralf