I've now uploaded the second beta release of L3DT version 2.6. The new changes are:
- Fixed crash with 'Operations->Active map->Split map into mosaic'.
- Fixed crash when double left-clicking with some brush tools in 2D display.
- Includes 'high speed' multi-core mosaic lightmap and texture calculations, as blogged here and here.
- Several tweaks to default settings.
PS: Some users may have disabled multithreading in L3DT Professional due to ... how shall I say ... unsatisfactory performance with previous releases. If you have done this, please go to 'Settings->Multi-thread settings' in the menu, and re-enable multithreading. You'll be glad you did!