Anyone have problems getting current (non-cached) data from whois.webhosting.info? I've run of few of their "advanced whois" checks on some of my domains and my client domains and the information seems very old.

A few of my clients websites still resolve to their old provider, for example, even though they've been with us for months. I've checked the same domains through dnsstuff.com and everything looks right, but I'm concerned about orphaned zone files laying around at previous hosts (mine and my clients).

Well I've just tried entering domains that most likely haven't been looked up there before and no information is shown apart from the WHOIS reply. That would indicate along with your findings that something may be broken :p