netmeg - 4:35 pm on Sep 27, 2011 (gmt 0)
I oversee a lot of WordPress sites, for myself and for clients.
First of all - you absolutely need to update WordPress. Every time. It's ridiculous how fast the updates come some time, but that's just the way it is. Not to do so is a huge risk.
Second of all, despite my having a lot of WordPress sites, I almost never have a problem with plugins that don't work. I don't use a *ton* of plugins, but I use reputable ones with a good history (or someone I know) behind them.
If this were my issue, I would start looking at those plugins, one by one, and seeing if I am really using the best one for the job.
You shouldn't be having this many problems.