ModRewrite treats quotes differently on my PC server than on my webhost's server

[RB101]

 

I'm trying to get a very simple rewrite rule to work, but on my PC-based test system only (it works on my webhost's server), I get an error with filenames containing any quotes (", %22). For example, this rule (which is even simpler than my actual rule):

 

RewriteRule (.*).htm$  new.html [L]

 

This successfully redirects any access to anything.htm (xyz.htm, or '123 456'.htm, or  abc+def.htm) to new.html, but (on my PC) NOT if it contains any quotes: "xyz".htm or %22xyz%22.htm fails, with a message that "The website declined to show this webpage". (As I said earlier, this DOES work on my webhost's system.)

 

I know it's probably quite simple, but I'm a novice at htaccess, and I'm stumped. Any ideas?