It looks like the 2010 Category Changes took place sometime within the last week. Of notice thus far, the Charlotte Marriott Executive Park went from a Category Four to Category Three, Bethesda Marriott North went from Cat4 to Cat 3, Grand Bohemian Asheville went from a Cat5 to Cat6,

How nice of the Marriott Rewards team to let us know about the changes

The first two changes mentioned appear to have occurred before March 26. I have just checked and there have been 26 changes since March as shown below:

Mar Aug Hotel
2 1 Fairfield Inn & Suites Augusta
2 1 Fairfield Inn & Suites Burlington
3 2 Courtyard Hamilton
1 2 Fairfield Inn & Suites Ankeny
1 2 Fairfield Inn & Suites Bloomington
1 2 Fairfield Inn Louisville South
1 2 TownePlace Suites Shreveport-Bossier City
3 2 Courtyard Detroit Metro Airport Romulus
3 2 Courtyard Columbia
1 2 Fairfield Inn & Suites Jackson Airport
1 2 Fairfield Inn & Suites North Platte
1 2 Fairfield Inn & Suites Somerset
1 2 Fairfield Inn Springfield
3 2 Courtyard Jackson
3 2 Courtyard Alexandria
2 3 Courtyard Tuscaloosa
2 3 Courtyard Bloomington Normal
2 3 Fairfield Inn & Suites Indianapolis Downtown
2 3 Fairfield Inn & Suites New Bedford
2 3 Residence Inn Waldorf
2 3 Courtyard Springfield
3 4 Courtyard Portland Airport
6 5 Bohemian Hotel Celebration, Autograph Collection
6 5 JW Marriott Hotel Miami
6 5 Courtyard Cape Cod Hyannis
6 5 El Monte Sagrado, Autograph Collection
5 6 JW Marriott Marquis Miami
5 6 Grand Bohemian Hotel Asheville, Autograph Collection
5 6 JW Marriott San Antonio Hill Country Resort & Spa