The Sun's transit sets the standard for North and South outlaying declination paths with the Tropic of Cancer and the Tropic of Capricorn. The Summer and Winter Solstices are the apexes of the declinations. While the Sun's transit has its limits, most of the other planets do not, and they routinely move past the Tropics of Cancer and Capricorn while transiting (from the Earth's perspective). When planets move past these lines, the terms extreme declination or out of bounds will frequently be attached to the placement.
Starting in November, 2010, the planets of Mercury and Mars will transit beyond the Tropic of Capricorn in the Southern Hemisphere for approximately a month, and a month and a half, respectively. These energies are typically associated with added stress on our lives. We feel like we are being overwhelmed with too much of something, but not really able to put our finger on what it is that is overwhelming us. Those of us who have planetary placements past the 13th degree of Sagittarius and before the 13th degree of Capricorn are also more inclined to feel the confusing energies take hold with this particular November/December transit. There tends to be a feeling of vulnerability and hopelessness. Try to stay away from medications or drugs that can add to the confusion.
You can find more information at Moon Tracks' Declinations page under the Ephemerides section.