This is just a minor issue, because its not really affecting the running application:
Placing a TWebPanel on a form and removing the caption in the property editor. Saving the project, closing the visual designer and reopen it. The TWebPanel caption is TWebPanel1 again. Surprisingly, when keeping this caption, it is not visible during runtime. Only when you change it with any other text, it will be visible during runtime. Maybe its not an issue at all, and there is an idea behind this behaviour I do not see.
Just wanted to mention it, maybe it has some more side affects somewhere else.