ReSharper is a great product overall, but there are quite a few annoying bugs to put up with. Please seriously consider spending A LOT of time on a release that ONLY fixes bugs - no new features. Sure, it would be an unconventional approach and your marketing department will hate you, since you can't exactly put "has less bugs" as a bullet point on the brochure, but I think your customers (developers) will appreciate it.
It has enough features already. Quite honestly, I hardly ever find myself thinking "I wish ReSharper did X" (some fancy new refactoring or whatever). On the other hand, I find myself thinking all the time "argh, I WISH ReSharper didn't leak memory so badly, I wish those damn tool windows would stay where I put them, I wish it Unit Test Runner would build the solution when needed and not build it when not needed, I wish I could switch between Debug and Release configurations, I wish IntelliSense would work first time when I type 'override'", etc., etc.
I think it's worth noting that the JetBrains support staff are great and genuinely do their best to help with problem. At the end of the day, however, there's only so much they can do to keep a customer happy when all these bugs still exists.
By the way, I would say the same thing to Microsoft about Visual Studio itself. Of course, they probably realise that if they ever released a version of VS.NET that JUST WORKS nobody would ever upgrade again. :)