sh404SEF v2.2.6.973 for Joomla 1.5 RETAIL

[bug] Specific sequence of user operations can lead to having custom sef urls in the database, but not showing in the url manager, particularly after purging urls
[chg] Updated database helper to latest version
[chg] Separate Profile and frontpage SEF urls in Jomsocial plugin
Tracker #353
[bug] Various missing UTF-8 compatibilty flags when using htmlspecialchars
[bug] Security issue, XSS
[chg] Updated and completed Russian translation by Alex Smirnov
[chg] Optimization: don't set base on homepage
[bug] Wrong check on redirect authorization: could allow redirecting on some ajax requests