You say you bought the skin?
If you bought it from a well known skin site (Not custom), they will probably have the updated skin up, or in the process of making it.
If not, just do what i did (If complex skin), go to Find Updated Templates > View History on the template.
Get the old and new code, put them in Dreamweaver, or something smiliar, have a quick look to see if you can see any appearence changes, then, have a quick skim through the code, and compare them.
It takes a long time, but it's worth it.
However, if your skin is very basic, not much template changes from the vB Default, just make a duplicate or backup of the skin, and revert, and hope for the best. :kickass:
Adrian