Improved Resampling (Speed; Lanczos artefacts: thanks to Marcel Lancelle)
New feature: Add watermark image (Edit menu and Advanced batch dialog)
Improved zooming: CTRL + wheel (keep mouse coordinates) and centered zoom
Support for WebP format (Weppy format, PlugIn, reading + saving)
Support for PDN format (Paint.NET format, PlugIn, thanks to ComSquare AG)
Support for XCF format (GIMP format, PlugIn, thanks to ComSquare AG)
Face Detection Plugin (Thumbnails window, thanks to MulticoreWare guys)
New JPG save option: Try to save with original (estimated) JPG quality
Improved/changed sort menus (XP/natural order)
New batch rename option: Run test rename
New Thumbnails menu: Refresh selected thumbs
Batch dialog, Output directory: Placeholders are now allowed
New Properties dialog: Zoom / Color management
New expert zoom option: Edit table with fixed zoom values (Properties->Zoom)
New fullscreen options: Center image, Text layer (Properties->Fullscreen)
New option in "Create multipage TIF/PDF" dialog: Load filenames from TXT file
New options in JPG IPTC/Comment dialogs: Allow Unicode PlugIn to change text
New command line option: /cmdexit (close current IrfanView after command line)
TIF bug with SGILog compressed images fixed (reported by Secunia, thanks!)
New special INI option to hide common folders in Open/Save dialog (see FAQs)
New hotkey: CTRL + SHIFT + K = Keep Scroll position

Sticky Password is available in English, French, German, Russian, Spanish and Czech.

The following issues have been resolved:

Firefox 9 and 10 compatibility added
Mozilla Thunderbird 7 compatibility issues
Skype 5 compatibility issue
Yahoo Messenger freeze while closing
Seamonkey browser support issue
Portable version doesn't work with Opera browser
Portable version Firefox 6 add-on issue

This is a maintenance release. The following items were fixed and/or added:
VMM: fixed VERR_MAP_FAILED during savestate under certain circumstances (bug #7929)
GUI: stop updating the VM status icons when the VM is paused (bug #8368)
VBoxManage: fixed wrong return code after startvm (bug #9642)
BIOS: fixed hang at launch of DOS applications generated by Clipper 5.3 (note that hardware virtualization may be required)
USB: fixed OS/2 boot hang when using recent USB drivers
NAT: increase maximum number of parallel connections making connections with port forwarding more robust (#8471)
Metrics: fixed potential problem with invalid access in guest metrics collection upon VM destruction
Main: don't crash if a medium is ejected twice (bug #9922)
VBoxSVC: fixed crash under rare circumstances (e.g. client crash)
VRDP: fixed screen freeze (bug #9620)
OVF/OVA: fixed broken disk images on import under rare circumstances
OVF/OVA: better error message when importing corrupted appliances
VMDK/VHD: fixed a possible corruption with host cache disabled when using snapshots under rare circumstances (bug #9749)
3D Support: Fixed fullscreen mode issues for ATI graphics (bug #9775), Windows Media Player rendering for XPDM-based Direct3D support (bug# 8341). Multiple fixes to XPDM and WDDM - based 3D support for Windows Guests and for 3D support in general
Linux hosts: fixes for Fedoras Linux 2.6.41 (bug #9948)
Linux hosts/guests: fixes for Linux 3.2 (bug #9743)
Solaris Additions: various shared folder fixes (bugs #9856, #9862, #9917)
Windows Additions: various fixes for Direct3D support (un)installation, added detection of missing or wrong Direct3D system files