Adblock works sporadically

[Technical Support]

Only using custom filters, adblock sometimes works and sometimes doesn't. For instance, defining the filter "^abc^" doesn't seem to do anything. Going to http://abc.domain.com works as does http://domain.com/abc and http://domain.com/abc/test. Longer filters seem to work better than short definitions, though the pattern may not hold under more extensive testing. Entering blocked url in the location bar sometime blocks on the first attempt then works normally on subsequent attempts (hitting return again or reload). Some filters seem to work fine for a while then stop working. Later they block a few more links then fail to block other links.

Midori 0.5.11 ((null)) Midori
GTK+ 2.24.28 (2.24.28) Glib 2.45.6 (2.46.2)
WebKitGTK+ 2.4.9 (2.4.10) libSoup 2.50.0
cairo 1.14.2 (1.14.2) libnotify No
gcr 3.16.0 granite No
Platform X11; Linux x86_64