In reference to your questions :
- Do you use a custom provider and url-encode the paths? If so, you need to decode them in the GenericHandler (.ashx file that handles the files) before using the paths. In case that your scenario is different, please open a new support ticket and send me a runnable sample. I will check it and do my best to help.
- This is a specific browser behavior and it is not directly elated to the RadFileExplorer control. More details on the subject can be found in this forum thread.
I hope this helps.
the Telerik team