It won't destroy data, but it won't really do anything. You can export the data, delete the database, and reinstall, wipe the tables of data, then reimport the old data. Kinda lengthy, but should be one or two steps with the phpmyadmin exporter, I think there's a option to have it wipe the table data
http://phpwsforums.com/showthread.php?t=3034 may help as well.
This latest build 700 (today's) fixes alot of bugs, and it's now rigorously tested versus the other builds (full test suites, etc), been on running beta with quite a few users running, but I understand the waiting.
I'd also contact your host and let them know there was corruption, might be something else going on.