This week, I received a report via private email that Bitdefender flags 32-bit Windows Lix as malicious (but not 64-bit Windows Lix) and prevents downloading. Here is my reply to that email:
I've let VirusTotal (virustotal.com) scan the zip archive of Lix 0.10.8 for Windows (x86). Result: 52 out 62 antivirus engines found nothing. 10 out of the 62 engines considered it malicious; among these, the most common diagnosis was Gen:Variant.Lazy.165509, and one Trojan.Lazy.D28685. In particular, Bitdefender believes it contains Gen:Variant.Lazy.165509, which agrees with your report.
Findings are practically the same if I upload only the 0.10.8 x68 executable (instead of the entire zip archive), with 13/71 engines flagging it as that Lazy virus.
Then I've uploaded the Lix 0.9.48 x86 executable or the Lix 0.10.3 x86 executable from half a year ago, again 10 engines find something, but now those 10 engines (including BitDefender) believe it to be Gen:Variant.Fragtor.90414.
Given these results, I'll consider it a false positive: The 10/62 engines detect a different virus (between the 0.10.3 and the current 0.10.8) even though I believe I haven't changed Windows D compilers or dependencies in the past months. Also, most engines (over 80 %) don't see any virus at all.
Lix might easily appear as a thread to antivirus heuristics: It's a largely unknown program, it changes reasonably often to avoid cataloguing by antivirus engines, it creates and deletes files (level/replay delete button), and it can connect to the internet.
All the engines consider the x64 executable completely clean. If you're unsure, I recommend the x64 version over x86 version anyway; the x86 build is a fallback for old machines.
-- Simon