avast! Version 4.6.665
May 22, 2005

Changelog:
* added support for additional executable unpackers (FSG, MEW, PE Deminisher)
* minor enhancements in the TAR unpacker
* more stringent checking of parameters passed in to all avast kernel mode drivers
* added the ability to on-access scan network drives even if the avast antivirus service runs under the LocalSystem account
* Standard Shield: removed OS freezing on startup when on-open scanning of all (*) files was selected
* fixed a minor problem in aswTdi.sys (that could theoretically lead even to the "BSOD")
* added detection of "computer reliability" and potential disabling of kernel-mode scanning if the computer doesn't seem reliable enough
* increased maximum size of configuration data of the on-access providers (e.g URL blocking masks etc.)
* WebShield: solved problem with Hotmail access from Outlook Expresu (lowered the Keep-Alive "aggresivity")
* WebShield: decreased the number of data written to ashwebsv.ws
* WebShield: fixed problems related to crashing of various third party LSP modules inside the ashwebsv.exe process
* WebShield: improved timeout for non-HTTP connections (e.g. ICQ via JAVA) and default connection timeout increased to 15 minutes
* WebShield: implemented maximum size of scanned file during download (by default, 20MB)

http://www.avast.com/eng/av4_revision_history.html