You can download this hot-fix roll-up for free here (it is a 2.6MB download).  Below is a list of the issues it fixes:

HTML Source view performance

·         Source editor freezes for a few seconds when typing in a page with a custom control that has more than two levels of sub-properties.

·         "View Code" right-click context menu command takes a long time to appear with web application projects.

·         Visual Studio has very slow behavior when opening large HTML documents.

·         Visual Studio has responsiveness issues when working with big HTML files with certain markup.

·         The Tab/Shift-Tab (Indent/Un-indent) operation is slow with large HTML selections.

Design view performance

·         Slow typing in design view with certain page markup configurations.

HTML editing

·         Quotes are not inserted after Class or CssClass attribute even when the option is enabled.

·         Visual Studio crashes when ServiceReference element points back to the current web page.

JavaScript editing

·         When opening a JavaScript file, colorization of the client script is sometimes delayed several seconds.

·         JavaScript IntelliSense does not work if an empty string property is encountered before the current line of editing.

·         JavaScript IntelliSense does not work when jQuery is used.

Web Site build performance

·         Build is very slow when Bin folder contains large number of assemblies and .refresh files with web-site projects.