I was just at the Post Office shipping out a record to the UK, and the clerk told me that on June 23rd, the Post Office is reclassifying weight limits for First Class shipments. It used to be that anything over 4 lbs had to be shipped Priority, which was a big bump in shipping cost (although is registered/insured, which is nice). Come June 23rd, anything over 1 lb will now be forced into Priority class instead of First Class (this is most records, even 1xLP, with mailer weight included). I'm not sure if they will alter the Priority rates or not to ease the pain. The record I shipped was 1.3 lbs (cost $24 First Class) and the clerk told me that if it went Priority, same weight, it would have cost over $50 with the current Priority rates.
This is gonna sting for international record shipments.