Yes, editing the Options registry key is the only method to disable the ‘show repairs’ dialog box. You can refer the following article on how to do it.
http://support.microsoft.com/kb/903740
The article is for Word 2003, but you can follow the same for Word 2007. The only difference is the 12.0 registry key instead of the 11.0 key (as you have mentioned in your post).
Note: Take a backup of the whole registry before you perform the operation. In the Registry Editor, right click on Computer at the top left corner > select Export > give a file name and save it to your desktop.
Hello, I also met this problem in word2010. By adding the registry key BulletProofOnCorruption, it works in the word 2010 32 bit (windows 7 32 bit). However, when I tried it on the word 2010 64bit(windows server 2008 sp1 64bit), it failed. Also, I had tried
to add both 64 bit DWORD and 32bit DWORD.
Could you help me? thanks a lot!