It’s been 5 long months since the last release of any kind for us unRAID users, but two days ago beta 7 made its way on the download block. From the unRAID forum, this is what is included/fixed with this release:
Changes from 4.5-beta6 to 4.5-beta7
-----------------------------------
Bug fixes:
- If 'config/style.css' is not present, then don't tell browser to load it.
- Fixed kernel crash when number of drives > 17, now correctly supports up to 20 drives ('Pro' issue only).
Other changes:
- Prevent disks appearing 'unformatted' as a result of incomplete Stop Array operation.
- Add driver for Adaptec 2410SA PCI RAID card (untested).
- Upgrade linux kernel to 2.6.30.8
- Upgrade samba to 3.3.7
- Upgrade fuse to 2.8.1
You can download it directly from here, or take it easy on Tom and grab the torrent here.

Beta8 is out now, and has some serious performance boosts:
unRAID Server 4.5-beta8 Release Notes
=====================================
Changes from 4.5-beta7 to 4.5-beta8
———————————–
New features:
- Enable ‘Cache Drive’ feature with ‘Plus’ registration key.
Bug fixes:
- Fixed path length limitation in user share file system.
- Fixed incorrect handling of file/directory mode and extended attributes in user share file system.
- Fixed intermittant kernel crash with more than 19 hard drives in array.
Other changes:
- Increased write peformance and added three user-tunables:
md_num_stripes to set the stripe cache size
md_write_limit to set a ceiling on most number of active write stripes
md_sync_window to set the parity sync/check window size in stripes
- The ‘mover’ script now uses ‘rsync’ to move files from the Cache drive to the array.
- Upgrade linux kernel to 2.6.31.5
- Changed linux kernel preemption model to “Voluntary Kernel Preemption”.
- Enable Samba asynchronous I/O.
- Changed ‘ide_core’ from module to built-in.
Cool…just got back from vacation so this will be nice getting home to!