Not really. It has always been legal to have a gun in your car in TX if you were "travelling". Previously that was to be considered to driving thru at least 2 counties. In addition it was a defence to prosecution which means you could be arrested and tried and you would get off if you could prove it in court. The change has been not in the castle law but in the definition of traveling for this section of the penal code. The code was amended to create a presumption of "traveling" for any motorist in a private vehicle who is not legally disqualified from owning a gun, does not belong to "a criminal street gang," is not engaged in criminal activity (beyond minor traffic infractions), and is not carrying the gun in plain view. Be aware tho many DAs have not instructed police to do anything different in their enforcement. Even tho there is now a presumption, many depts still act exactly the same as in 2005 when you had to prove that you were travelling. Here is a great quote.Yeah it became legal with the Castle Law if I recall correctly.
"Charles A. Rosenthal Jr., the district attorney of Harris County, which includes Houston, argued, "The presumption of innocence does not make the person innocent.""
http://www.nytimes.com/2007/04/05/u...734e36931&ei=5090&partner=rssuserland&emc=rss