Xlib: Maximum number of clients reached -- firefox?

[Christopher Aillon]

Joshua Baker-LePain wrote:
> I'm rather happily running FC6 on my Thinkpad Z61t.  I got even happier 
> when I discovered that suspend works without a hitch, with no 
> pre-suspend fiddling required.  On resume, everything comes back up 
> including my WPA-encrypted ipw3945 wireless connection, and this with my 
> HDD in AHCI mode.  All very, very shiny.
> 
> So I haven't shut down or logged out in a week.  Today, though I started 
> getting errors like this upon trying to start new apps:
> 
> Xlib: connection to ":0.0" refused by server
> Xlib: Maximum number of clients reached
> 
> 'xrestop' takes an absurd amount of CPU time to run, but seems to 
> indicate that firefox has a huge number of windows open (over 2500).  I 
> certainly don't have that many windows/taps actually open, but I also 
> haven't shut down firefox in almost a week.
> 
> Is this a firefox bug that needs reporting?  If not, where should I be 
> looking?

It's not firefox, it's flash 9 beta. 
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=217005

I suggest you report it to Adobe via whatever mechanism the beta program 
uses.