G'day from Oz, First I would suggest you repost this on the general discussion forum as you will most likely get more responses.
Is your boat on a trailer or moored. If moored i would be checking all bilge areas for water . This will make the boat heavy and also tender ie. unstable.
As you say your tabs are working and you haven't changed anything from previous trips then do a search on this site for handling tips on 265's. They are more sensitive than some hulls, but not difficult to find the right trim etc.
Being a deep V witbh up to 22 deg deadrise they usually require tabs for latteral trim, and if people or load shifts while running as well as wind direction, then be prepared to adjust tabs accordingly.
As they are able to carry a heavy load of fuel and people this can make for some interesting trim adjustments, particularly in difficult seas.
One thing to be aware of with tabs is to always remove the exsisting tab setting before adding more to the other side as a situation changes.