Got a weird problem I haven't seen before. When encountering the 'outdated code signing key' issue, I'm trying to re-add the project after removing it (as per server instructions). For the first time, I'm not able to re-add the project: BOINC Manager becomes unresponsive at the 'Communicating with project. Please wait...' dialogue, and I notice a steady increase in memory usage that would presumably saturate my system if I don't kill the BOINC Manager process first.

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
   8084 ........  20   0  106.4g   4.3g  76148 R 100.0  27.6   3:26.59 boincmgr

(4.3g and climbing...)

What could cause this?

(I've tried rebooting, re-installing BOINC, etc)

I worked around the issue by using the command-line. But I still find it worrying that something could cause BOINC Manager to consume memory indefinitely.

Code-signing has to do with certs. New client probably needs new certs. BOINC is constantly polling the server trying to update your certs.

It's not a new client, it's been running on all of my Linux machines. But that's a digression from the main topic here, which was the memory consumption.