When Booth and Brennan are making their way to the Full Health drug shop, Brennan's hair is straight. When they arrive at the drug shop, Brennan's hair is in a different style, and is completely curly.
When Booth and Sweets are at the gun range, Booth is packing up to leave, on the Range Rules sign hanging on the wall, the 4th rule reads "Permission ust be given for full auto discharge".
Dr. Brennan is incorrect in her statement that it would have been illegal for her to have pre-marital intercourse with Booth in Virginia - the law against "fornication" was overturned as unconstitutional by the Supreme Court of Virginia in Martin vs. Ziherl (2005), long before the two characters started having sexual relations.