Script or process to fix old invalid data in repositories or dumps?

Loading a dump file into a new repository, and running into this:

svnadmin: E125005: Invalid property value found in dumpstream; consider
repairing the source or using --bypass-prop-validation while loading.
svnadmin: E125005: Cannot accept non-LF line endings in 'svn:log' property

So I realize I can use that option to force the file to load, but that is
just punting the problem to the future. Has anyone ever written any
scripts that can run through an entire repository and fix these sort of
problems? In this case, maybe a script that goes through a repos and
retrieves and then sets each revprop using the current command line?

Another problem I've seen is when the data is not UTF8. I know you can use
svnsync to fix this problem by using the --source-prop-encoding ARG option.
 Are there any scripts to do this without doing an svnsync?

If not, does svnsync at least auto-fix the line-ending problem?

-- 
Thanks
Mark Phippard
http://markphip.blogspot.com/