Bug reports without an attached log file are usually useless.
Re: WinSCP hangs when browsing file named com1.*
Thanks for your post. This bug is being tracked already.
WinSCP hangs when browsing file named com1.*
Topic says it all.
I had a file named com1.xml, and when browsing the dir with this file in it, WinSCP hangs.
Renaming the file to something else than com1 resolved it, but if I just changed the extension it didn't help.
Reproduced this with winscp 4.1.6 and 4.1.8 on Windows XP and Windows Vista.