I currently have a project open.
When I open a new project in the same window, the transaction history for project 1 now displays also for project 2.
Even when I quit SmartSVN and open it again, it loads project 2 but shows the transaction history for project 1.
The only way I have found to fix this is to go into the smartsvn files and delete the transaction history for project 2, then next time I open SmartSVN, it will see that there is no transaction history and reload it with the correct history.