Another fix for the spurious acatalog/ on the home page may be this:  
In post #5 replace the line:
	With
	
							
						
					In post #5 replace the line:
Code:
	
	<form method="post" action="<actinic:variable name="OnlineScriptURL" value="Shopping Cart Script URL" />">
Code:
	
	<form method="post" action="<actinic:variable name="OnlineScriptURL" value="Shopping Cart Script URL" />" onsubmit="this.PAGEFILENAME.value = this.PAGEFILENAME.value.replace(/acatalog\//i, '')" >
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