With the 1.1.0 sbt-idea plugin I'm seeing compile errors in IntelliJ 12 regarding "reference value servlet of package javax" missing. Upgrading to 1.2.0 sbt-idea plugin and running gen-idea resolves this for me.

Branch d6y_sbtidea_1.2.0 containing this change will be pushed in a few minutes for your consideration.

Because some hoster like Cloudbees support only sbt 0.11.3 for now, I suggest to make the plugins..sbt compatible and check for the sbt version:

libraryDependencies <+= sbtVersion(v => v match {
case "0.11.0" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.0-0.2.8"
case "0.11.1" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.1-0.2.10"
case "0.11.2" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.2-0.2.10"
case "0.11.3" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.3-0.2.11.1"
case "0.12.0" => "com.github.siasia" %% "xsbt-web-plugin" % "0.12.0-0.2.11.1"
case "0.12.1" => "com.github.siasia" %% "xsbt-web-plugin" % "0.12.0-0.2.11.1"
})

The 2.5-M3 ZIP (and presumably TAR) will report...

module not found: net.liftmodules#lift-jquery-module_2.9.1;2.5-M3-1.0

...as the JQuery module was bumped to 2.0.

I'll attach a candidate fix to this issue in a few minutes.

Is it OK that in the default.html template it is said:
xmlns="http://www.w3.org/1999/xhtml"

and in Boot.scala:
LiftRules.htmlProperties.default.set((r: Req) =>
new Html5Properties(r.userAgent))
?

BTW, a very useful project, thank you very much.)