Kdyz se vysledek neshoduje s pozadovanym chovanim, tak se nemusi jednat o chybu - priorita operatoru je totiz ignorovana.

http://www.w3.org/Style/CSS/Test/CSS3/Selectors/current/html/index.html

Groups of selectors (#1)
Type element selectors (#2)
Universal selector (no namespaces) (#3a)
Omitted universal selector (#4)
Attribute existence selector (#5)
Attribute value selector (#6)
Attribute multivalue selector (#7)
Attribute multivalue selector (#7b)
Attribute value selectors (hyphen-separated attributes) (#8)
Substring matching attribute selector (beginning) (#9)
Substring matching attribute selector (end) (#10)
Substring matching attribute selector (contains) (#11)
Class selectors (#13)
More than one class selector (#14)
More than one class selector (#14b)
More than one class selector (#14c)
NEGATED More than one class selector (#14d)
NEGATED More than one class selector (#14e)
ID selectors (#15)
Multiple ID selectors (#15b)
:link pseudo-class (#16)
:visited pseudo-class (#17)
:hover pseudo-class (#18)
:hover pseudo-class on links (#18a)
:hover pseudo-class (#18b)
:hover pseudo-class on links (#18c)
:active pseudo-class (#19)
:active pseudo-class on controls (#19b)
:focus pseudo-class (#20)
:target pseudo-class (#21)
:target pseudo-class (#21b)
:target pseudo-class (#21c)
:lang() pseudo-class (#22)
:enabled pseudo-class (#23)
:disabled pseudo-class (#24)
:checked pseudo-class (#25)
:root pseudo-class (#27)
Impossible rules (:root:first-child, etc) (#27a)
Impossible rules (* html, * :root) (#27b)
:nth-child() pseudo-class (#28)
:nth-child() pseudo-class (#28b)
:nth-last-child() pseudo-class (#29)
:nth-last-child() pseudo-class (#29b)
:nth-of-type() pseudo-class (#30)
:nth-last-of-type() pseudo-class (#31)
:first-child pseudo-class (#32)
:last-child pseudo-class (#33)
:first-of-type pseudo-class (#34)
:last-of-type pseudo-class (#35)
:only-child pseudo-class (#36)
:only-of-type pseudo-class (#37)
::first-line pseudo-element (#38)
::first-letter pseudo-element (#39)
::first-letter pseudo-element with ::before pseudo-element (#39a)
::first-letter pseudo-element (#39b)
::first-letter pseudo-element with ::before pseudo-element (#39c)
::selection pseudo-element (#40)
::before pseudo-element (#41)
:before pseudo-element (#41a)
::after pseudo-element (#42)
:after pseudo-element (#42a)
Descendant combinator (#43)
Descendant combinator (#43b)
Child combinator (#44)
Child combinator (#44b)
Child combinator and classes (#44c)
Child combinatior and IDs (#44d)
Direct adjacent combinator (#45)
Direct adjacent combinator (#45b)
Direct adjacent combinator and classes (#45c)
Indirect adjacent combinator (#46)
Indirect adjacent combinator (#46b)
NEGATED substring matching attribute selector on beginning (#54)
NEGATED substring matching attribute selector on end (#55)
NEGATED substring matching attribute selector on middle (#56)
NEGATED class selector (#59)
NEGATED ID selector (#60)
NEGATED :link pseudo-class (#61)
NEGATED :visited pseudo-class (#62)
NEGATED :hover pseudo-class (#63)
NEGATED :active pseudo-class (#64)
NEGATED :focus pseudo-class (#65)
NEGATED :target pseudo-class (#66)
NEGATED :target pseudo-class (#66b)
NEGATED :lang() pseudo-class (#67)
NEGATED :enabled pseudo-class (#68)
NEGATED :disabled pseudo-class (#69)
NEGATED :checked pseudo-class (#70)
NEGATED :root pseudo-class (#72)
NEGATED :root pseudo-class (#72b)
NEGATED :nth-child() pseudo-class (#73)
NEGATED :nth-child() pseudo-class (#73b)
NEGATED :nth-last-child() pseudo-class (#74)
NEGATED :nth-last-child() pseudo-class (#74b)
NEGATED :nth-of-type() pseudo-class (#75)
NEGATED :nth-of-type() pseudo-class (#75b)
NEGATED :nth-last-of-type() pseudo-class (#76)
NEGATED :nth-last-of-type() pseudo-class (#76b)
NEGATED :first-child pseudo-class (#77)
NEGATED :first-child pseudo-class (#77b)
NEGATED :last-child pseudo-class (#78)
NEGATED :last-child pseudo-class (#78b)
NEGATED :first-of-type pseudo-class (#79)
NEGATED :last-of-type pseudo-class (#80)
NEGATED :only-child pseudo-class (#81)
NEGATED :only-child pseudo-class (#81b)
NEGATED :only-of-type pseudo-class (#82)
NEGATED :only-of-type pseudo-class (#82b)
Negation pseudo-class cannot be an argument of itself (#83)
Nondeterministic matching of descendant and child combinators (#86)
Nondeterministic matching of direct and indirect adjacent combinators (#87)
Nondeterministic matching of direct and indirect adjacent combinators (#87b)
Nondeterministic matching of descendant and direct adjacent combinators (#88)
Nondeterministic matching of descendant and direct adjacent combinators (#88b)
Simple combination of descendant and child combinators (#89)
Simple combination of direct and indirect adjacent combinators (#90)
Simple combination of direct and indirect adjacent combinators (#90b)
NEGATED :enabled:disabled pseudo-classes (#144)
:empty pseudo-class and text (#148)
:empty pseudo-class and empty elements (#149)
:empty pseudo-class and empty elements (#149b)
:empty pseudo-class and XML/SGML constructs (#150)
:empty pseudo-class and whitespace (#151)
:empty pseudo-class and elements (#152)
Syntax and parsing (#154)
Syntax and parsing (#155)
Syntax and parsing (#155a)
Syntax and parsing (#155b)
Syntax and parsing (#155c)
Syntax and parsing (#155d)
Syntax and parsing (#156)
Syntax and parsing (#156b)
Syntax and parsing (#156c)
Syntax and parsing (#157)
Syntax and parsing (#158)
Syntax and parsing of new pseudo-elements (#159)
Syntax and parsing of unknown pseudo-classes (#160)
Syntax and parsing of unknown pseudo-classes and pseudo-elements (#161)
Contextual ::selection (#162)
:focus with ::selection (#164)
:hover with ::selection (#165)
:first-letter with ::first-letter (#166)
:first-letter with ::first-letter (#166a)
:first-line with ::first-line (#167)
:first-line with ::first-line (#167a)
:before with ::before (#168)
:before with ::before (#168a)
:after with ::after (#169)
:after with ::after (#169a)
Long chains of selectors (#170)
Long chains of selectors (#170a)
Long chains of selectors (#170b)
Long chains of selectors (#170c)
Long chains of selectors (#170d)
Parsing: Numbers in classes (#175a)
Parsing: Numbers in classes (#175b)
Parsing: Numbers in classes (#175c)
Combinations: classes and IDs (#176)
Parsing : vs :: (#177a)
Parsing : vs :: (#177b)
Parsing: :not and pseudo-elements (#178)
::first-line on inlines (#179)
::first-line after <br> (#179a)
::first-letter after <br> (#180a)
Case sensitivity (#181)
Syntax and parsing of class selectors (#183)
NEGATED Dynamic handling of :empty (#d1)
Dynamic handling of :empty (#d1b)
Dynamic handling of combinators (#d2)
Dynamic updating of :first-child and :last-child (#d4)
:indeterminate (#d5)
:indeterminate and :checked (#d5a)
NEGATED :indeterminate and :checked (#d5b)
:indeterminate and :checked (#d5c)
:indeterminate with :checked (#d5d)
NEGATED :indeterminate with :checked (#d5e)