The following issue just crept up on me. The steps mentioned below had worked just fine until about 2 days ago.
When I deploy a update to a solution (of web parts) to a SharePoint 2010 server I don't see the update. The solution does get installed, but from what I can tell the installed web parts are over a month old (nothing new is installed).
I do the following steps through PowerShell:
retract the solution from the web app remove the solution add the solution install the solution to the web app
I have tried restarting the Web App, restarting IIS and also restarting the server. Nothing seems to work.
I notice that after I remove the solution it does get removed from the GAC. After I add/install it the solution does reappears in the GAC.
Am I missing something? Am I overlooking a step that I should be doing? Something to try?