I always use the Direct Link from Photobucket for any images I post from my account regardless of forum I'm on. Instead of right clicking on the link to copy, use the key commands.
Place your cursor in the Direct Link code box. Highlight the line of code to be copied, by using Ctrl A to ensure all of the code line is highlighted, followed by Ctrl C to copy it. Then in the filmstrip box use Ctrl V to place it.