This is a link to the new IPSC rules for 2012, and a PDF of the unofficial marked up version showing the changes.
http://www.ipsc.org/pdf/RulesHandgun.pdfFor those who didn't want to read everything, the big changes are these;
2.2.1.2 - you cannot take short cuts across fault lines that are meant to designate a passageway - 1 procedural per shot after shortcut.
2.2.7 a platform may be asked for if ports not at a reachable height for a competitor.
4.3.2.2 If using mini and full sized poppers the minis must be at least 2 meters rearward of the furtherest full sized ones.
8.1.3.1 when WSB requires placing firearm on a table it cannot be propped up by any external thing
8.5.1.1 though this has not changed, movement is defined a taking more a single step, not 2 steps as I often hear.
8.7.1 You cannot take sight pictures or dry fire prior to start signal - warning first time, then procedurals.
9.1.4.2 if you self stop or hesitate during a COF because you think targets have not been patched - no reshoot - we have always enforced it but some shooters did not know about is so there is now a rule.
9.2 No more Virginia count, Fixed Time or Standard Exercises
9.9 If the highest scoring area is visible on a target that is moving or obscured by moving barriers are not disappearing and incur penalties - read it as it says lot more.
10.2.8 If the COF stipulates strong of weak hand only you will get a penalty for scooping the gun with the
other hand off the table at a table start
10.2.8.2 procedural for using ground, barricade or other prop to increase stability in weak / strong hand only COF
10.2.11 Procedurals for shooting over a barrier 1.8 meters high or greater - yep, it happens!
10.4.3 tightens up AD on load - no longer includes 'while preparing to'