A custom .png image file was set as a splash screen to be displayed during the user logon process, but the image does not appear during the process. The Administrator Guide said the following graphic formats are supported: bmp, rle, gif, png and jpg.
原因
This is a known issue reported under the Product Defect Number DAMS-5548.
解决办法
Status: The product defect DAMS-5548 will be fixed in a future release. When the new version is released, please refer to the “Resolved Issues” and "New Features" sections of the Product Release Notes for a complete list of change request IDs addressed in the new release.
Workaround: By now, only .JPG files are working fine.