The Phoenix Firestorm Viewer team has been telling people for some time now that Phoenix will at some point become next to unusable. A significant number of people have listened and moved to a modern viewer, some have not yet. If you are one of the latter, I suggest you reconsider and update very soon as Linden Lab has announced a tentative date for starting to switch on SSA (server side appearance).
The following is a quote from Nyx Linden
“We currently are not aware of any major release-blocking bugs and are starting to look at scheduling the roll-out process. We have a number of QA passes and tests to run through before we can get the final greenlight to do so, so we are currently targeting July 9th as the earliest date at which we will enable SSA for a significant portion of the grid (a server RC channel). Please note that if we find additional bugs in the meantime, or run into other scheduling difficulties this date could be pushed back. We will not be going to RC before this date however.”
So the clock is now ticking much louder than it was, time is getting short. I strongly suggest you update to a SSA capable viewer. Those on Firestorm 4.4.0 will be fine although there will be a release very soon with a few additional fixes to the SSA code in it. When it comes out please update as soon as possible. Those on Phoenix and other older viewers all I can say is update to a modern viewer now. If you choose to move to Firestorm we do have classes to help you get used to it as well as our Wiki and inworld support groups.