I ran into this problem last night, and had a hard time Googling a solution, so here’s a brief summary of what I did just in case anyone else runs into it.

I was trying to set up VirtualBox on Mac OS X to share a directory between OS X and my Windows XP virtual machine. Under VirtualBox 2.0.2, here’s how you do that:

1. Open VirtualBox. Make sure the virtual machine you’d like to share with is stopped. This should give you access to “shared folders” setting under the info panel.
2. Open up that shared folders setting, and choose the directory you’d like to share and give it a name. Remember that name, because that winds up being used as part of a network share location by Windows XP.
3. Save those settings, and start up your virtual machine.
4. Here’s the part that took me an hour to figure out: you need to install the VirtualBox “guest additions” on your virtual machine to actually allow you to connect to the share. That’s located under the “Devices” menu item. You’ll be prompted to install guest additions and a bunch of drivers on your Windows XP VM; go ahead and accept all the prompts that pop up on the screen and reboot the VM if necessary.
5. When your VM reboots, head over to the My Computer section and choose “Map Network Drive.” You’ll be mapping a drive with the following format: \\vboxsvr\[your_share_name_from_step_2]. The \\vboxsvr hostname is the standard default set by VirtualBox, so that’s what it should be on your install, too, unless there’s a way to change it.. While you’re here, check off the “Reconnect at logon” box so you’ll never need to do this step again.
6. You’re done.

Tags: VirtualBox, sun, vm

As you may know, all browsers have a set of CSS features that are either considered a vendor extension (e.g. -ms-interpolation-mode), are partial implementations of properties that are fully defined in the CSS specifications, or are implementation of properties that exist in the CSS specifications, but aren’t completely defined. According to the CSS 2.1 Specification, any of the properties that fall under the categories listed previously must have a vendor specific prefix, such as ‘-ms-’ for Microsoft, ‘-moz-’ for Mozilla, ‘-o-’ for Opera, and so on.

IEBlog : Microsoft CSS Vendor Extensions

Nice to see IE jump on the vendor extension prefix bandwagon. Although it does break backwards compatibility to an extent (annoying), it will allow browsers to play better together.

Also, nice to see that they’re doing the “implement draft CSS specs” as prefixed, too.

Tags: ie8, cross-browser