Acid2 is supported by:
- WebCore-based (Safari, OmniWeb, Shiira)
- Konqueror
- Prince
- iCab
- Presto-based (Opera, Internet Channel on Wii)
- Gecko-based 1.9+ (Firefox 3 beta)
It is not supported by:
- Internet Explorer
- Firefox 2 (Current stable version)
- NetFront (PS3 browser)
So yes, technically IE is not the only browser that doesn't support it, but they are the only browser which has said that CSS compliance is not a priority for them.
I think it's nitpicking to say that the current version of FF doesn't support Acid2. It's clear that MS doesn't care to implement CSS correctly - and they only reason they can do that is because of their extraordinary market share. That's wrong.
Acid2 is supported by: - WebCore-based (Safari, OmniWeb, Shiira) - Konqueror - Prince - iCab - Presto-based (Opera, Internet Channel on Wii) - Gecko-based 1.9+ (Firefox 3 beta)
It is not supported by: - Internet Explorer - Firefox 2 (Current stable version) - NetFront (PS3 browser)
So yes, technically IE is not the only browser that doesn't support it, but they are the only browser which has said that CSS compliance is not a priority for them.