I found a fairly nice work-around for me but it involves using Microsoft Excel. If you follow the steps in my comment on the first answer you will get to a page that has the information you want to recover on the left side under Previous Information.
Using your cursor, click to the left of Bio Changes and drag down to the bottom of the information you want to recover. (It will select the data in the Changed Information column also but don’t worry about that for now.) Then copy that with a Ctrl+c or right-click, copy.
Open Excel, right click in cell A1, and choose paste. You will want to play with the width of the columns but what you will have is all the plus (+) signs in column A, the Previous Information will be in column B, the minus (-) signs will be in column C, and the Changed Information will be in column D.
Now just the previous information that you want to recover will be nicely stored in column B. Simply highlight all the cells in that column and copy. Now go back to your profile text box for the bio and paste it into place. You may want to delete the bad information first or just select it and paste over the top. It worked pretty slick for me.
Note: If you don’t have Excel you can download Apache OpenOffice. It is a free open-source productivity suite. I tried using the OpenOffice spreadsheet but it had fits with the === tags. It tried to make them a formula and gave me an error. You will have to go to each cell that has a === tag and put an apostrophe (‘) in front of the ===. Then it will treat it as text and you can proceed as explained above.