Conflict Between Comodo Firewall and Cisco VPN Client

There’s a conflict between Comodo Firewall and the built-in firewall in Cisco’s VPN client which can cause blue screens. You’ll see a DRIVER_IRQ_NOT_LESS_OR_EQUAL error caused by inspect.sys or vsdatant.sys. One way to work around it is to install the VPN client without the built-in firewall: msiexec.exe /i vpnclient_setup.msi DONTINSTALLFIREWALL=1 The other way is to remove vsdata.dll, vsinit.dll and vsdatant.sys […]

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Sub-pixel letter-spacing in CSS

There’s a thread on the Sitepoint forums about the smallest amount of letter-spacing you can use. Most of the responses are useless, annoying and wrong, but #36 finally gives a good answer. Most browsers only support integer pixel values for letter-spacing. This is a problem because, when it comes to letter-spacing, there’s a big difference between […]

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Cross-Domain AJAX Requests

Browsers prevent standard AJAX calls across domains for security reasons, but you can make JSONP calls instead. If you’re using jQuery you just need to add ‘callback=?’ to the url: $.getJSON('http://some-foreign-server.net/ajax-handler.php?param1=foo&param2=bar&callback=?', function(data) { // do stuff } ); Then setup the request handler to prepend the callback parameter to the response and wrap it in […]

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