Unstrusted certificate error message when checking for updates (5.9)

Hello,

When checking for updates I get a pop-up window where it can be read "Untrusted certificate. Server certificate verification failed: issuer is not trusted". I'm running Windows XP but this is the first time I get this kind of warning when checking for updates.

Any hint? Thanks!

This bug is being tracked already:
Issue 1442 – Certificate validation fails on Windows Vista and older

Thanks a lot for the pointer, I must have overlooked the issues tracker and the forums. Glad to see it solved!