Two Point Hospital v1.4.21253 Update changelog:
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Here is a list of what is in this patch;

Copy and paste rooms
Fix corrupt saves due to light headedness patients in a certain state
Fix corrupt saves due to broken guest trainers that were already in a vehicle
Fix corrupt saves due to characters interacting with broken items
Make some parts of game friendlier to anti-virus (fixes some random hard crashes)
Fix graphical issues on OSX 10.10 (Yosemite)
Fix various instances of room building getting broken
Fix various instances of characters getting stuck
Improved queuing situation with various bug fixes and balance tweaks (We are still working on this!)
Cafe is a bit more sensible in terms of desirability compared to vending machines (if you have a cafe in an already built hospital you will need to edit it and rebuild for the change to take effect)
Fix queue positions in selection UI not updating
Fix staff getting tired, hungry etc before being placed in the hospital
Fix finance not working after loading last save after going bankrupt
Fix ghosts broken after loading save
Fix machine upgrades being carried across if you copy and pasted a room while an upgrade was in progress
Fix bug with recruitment marketing campaigns after loading from a save