Index: lib/redmine/wiki_formatting/textile/redcloth3.rb
===================================================================
--- lib/redmine/wiki_formatting/textile/redcloth3.rb	(revision 17157)
+++ lib/redmine/wiki_formatting/textile/redcloth3.rb	(working copy)
@@ -514,7 +514,7 @@
         atts
     end
 
-    STYLES_RE = /^(color|width|height|border|background|padding|margin|font|text|float)(-[a-z]+)*:\s*((\d+%?|\d+px|\d+(\.\d+)?em|#[0-9a-f]+|[a-z]+)\s*)+$/i
+    STYLES_RE = /^(color|(min-|max-)?+(width|height)|border|background|padding|margin|font|text|float)(-[a-z]+)*:\s*((\d+%?|\d+px|\d+(\.\d+)?em|#[0-9a-f]+|[a-z]+)\s*)+$/i
 
     def sanitize_styles(str)
       styles = str.split(";").map(&:strip)