The Tab Hunter/Dawn Addams "Return to Treasure Island" (1954) is mildly entertaining, but banish all notions that it has anything to do with 1930s Hollywood swashbucklers. This low-budget flick used to appear on TV, but it has not made it to DVD (or even VHS, as far as I know). It disappeared from TV long ago, perhaps partly because of a scene in which Dawn Addams is tied to a tree and whipped to make her reveal some information (probably the whereabouts of the treasure, but I don't remember—I haven't seen this picture for decades).
Note that another (much better known) 1954 film, with Robert Newton as Long John Silver, now goes by the same title. I believe it was originally simply "Long John Silver." This is the picture whose DVD cover erroneously appears on the IMDb.com page.
Note: I see that IMDb has corrected the graphic. (Wow, nine years have flown by.)