Hmmm, a new odd issue that has just started. Every now and then VS drops a whole bunch of projects from the solution. It will say at the top of Solution explorer "42 projects" when it is displaying only about 20 or so. Closing VS and re-opening it fixes this, although it is a bit of a pain as it takes a little while for the .sln to open again.
We run VS2005 and mainly work on a 42 project solution targetting the Compact Framework 2.00. I'm pretty much the only one using Resharper here (despite my recommendations to others and their occasional oOoing and ahhing at its beauty) so i use CTRL+T to find classes but when i've been hitting SHFT + ALT + L to select the item in the solution explorer (to view the history in TFS) it hasn't matched anything which is how i've noticed this issue.
Anyone experienced this before?