.dropshadow1{
	background: url(images/shadowAlpha.png) no-repeat bottom right 	
}

the rule above reports that the background property is invalid - the "right" token is unexpected.

This is due to the missing support of "&&" (AND) operator in the GrammarResolver. Since the operator is really rare in the grammars, before I reimplemented the grammar resolver, I replaced the operator in the property grammars by whitespace which changed the semantic to SEQUENCE. As it turned out such workaround have some consequences as demonstrated in the sample above.

The consequence also is that the code completion doesn't properly offer the completion items.

I've temporarily resolved the issue in the grammar itself by transcribing the 

(A && B) by ( ( A B) | (B A) ) but still the issue should be resolved properly in the GrammarResolver/GrammarParser classes + all the workarounded properties should be updated to the original form.