Looping 301

In the custom rules i have created the following rule:
'index.php?p=external' => 'external-news.html'

When i accidently typed in external-news.php, i've received a warning from firefox: "Redirection limit for this URL exceeded. Unable to load the requested page. This may be caused by cookies that are blocked." (where cookies are not blocked at all...)

When i reviewed the logfile to see what happened, i can see:
GET /external-news.php HTTP/1.1" 301
GET /external-news.php/ HTTP/1.1" 301

Where the second line is being looped.

Imho, this should result in a 404...

Even with the few escapes '\' in the rule, it has the same effect ('index\.php\?p=external' => 'external-news.html') where i did not put escapes in the .html side, as it also isn't the case with the 2 examples in vbseo_cp.php.

Whats even worse internet explorer doesn't seem to have this "redirection limit", wich causes the server load to increase slowly... even by guests (who normally can't reach the page). 800+ redirects increased the load by +- 0.50 on my server.

/* NOTE: This issue has been resolved in RC8. */

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