What can it be? All images are PNG 8bit. Using PB 4.50
Now i am designing GUI for my 1st serious project after my control test app (irc server/client) and it is not working at 1st step

Without the code which shows the problem we cannot help you, as we are not mind readerssartic wrote:it works always when u disable "include binary bitmaps"

at least 3x smaller size and for icons 256 color is enoughIdeasVacuum wrote:...Never had a problem like that caused by Visual Designer, very likely that you have something odd in the code - PNG 8bit is unusual, that might have something to do with it. Is there any specific reason why 8bit is used?

Well, unless your app is running on a mobile platform or you have thousands of images buttons, the file size saving means very little. However, if you are confident that your code is correct then I would check the validity of the image files with Irfan View (simply open them and re-save them).at least 3x smaller size and for icons 256 color is enough